Web Images Groups Books Scholar Blogs Gmail more »
Recently Visited Groups | Help | Sign in
Google Groups Home
Physics: Separate Particles Communicate at a Distance
There are currently too many topics in this group that display first. To make this topic appear first, remove this option from another topic.
There was an error processing your request. Please try again.
flag
  Messages 51 - 75 of 86 - Collapse all  -  Translate all to Translated (View all originals) < Older  Newer >
The group you are posting to is a Usenet group. Messages posted to this group will make your email address visible to anyone on the Internet.
Your reply message has not been sent.
Your post was successful
 
From:
To:
Cc:
Followup To:
Add Cc | Add Followup-to | Edit Subject
Subject:
Validation:
For verification purposes please type the characters you see in the picture below or the numbers you hear by clicking the accessibility icon. Listen and type the numbers you hear
 
Brian 'Rev P-K' Siano  
View profile  
 More options Aug 23 1991, 12:19 am
Newsgroups: sci.skeptic, alt.paranormal
From: re...@cellar.UUCP (Brian 'Rev P-K' Siano)
Date: 22 Aug 91 23:02:20 GMT
Local: Thurs, Aug 22 1991 6:02 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance

        Steve is describing the famous "Einstein-Rosen-Podolsky" experiment,
which Einstein devised to argue against quantum mechanics. It's also not a
bad description.

        A little closer to the point, we have two particles with correlated
spin. But, thanks to the Copenhagen Interpretation, we must say that the
particles fall into either an 'up' spin or a 'down' spin only when we measure
them.

        The experiment requires the two particles to be speeding away from
each other (at the speed of light, natch); when we measure the spin of one,
we therefore cause the other particle to fall into the appropriate
eigenstate instantly.

        The experiment was proposed by Einstein to Neils Bohr, in an attempt
to argue down QM-- that is, if QM was true, then the experiment would result
in this absurdity. When they finally DID try the experiment, the above more
or less happened.

        Now, consider this: this experiment, which confirmed the validity of
quantum mechanics, is now being touted by Steve as proof for psi-- and, by
extension, disputing the scientific world-view that came up with QM in the
first place. Also, in order to make sense of this example of apparent
non-causlity, Steve appeals not to a Capra-like 'holism,' but he feels he has
to impose a causal, reductionist interpretation onto it!

        Steve, if you believe that 'holistic thinking' is preferred over
good ol' inference of causality, then WHY are you proposing a
supra-light-speed communication? Seems to me you've having trouble getting
out of the "if this happens, then this must then happen" anti-holistic
mind-set.

        "Causing scientists to rethink?" If I know my history of science, an
experiment that _confirms_ the reigning scientific models doesn't exactly do
that.

""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
Brian Siano,                                Delaware Valley Skeptics
Rev. Philosopher-King of The First Church of the Divine Otis Redding
re...@Cellar.UUCP                     "Ecrasez l'enfame!" - Voltaire
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Daniel Jimenez  
View profile  
 More options Aug 23 1991, 1:12 am
Newsgroups: sci.skeptic, alt.paranormal
From: djime...@ringer.cs.utsa.edu (Daniel Jimenez)
Date: 23 Aug 91 05:36:34 GMT
Local: Fri, Aug 23 1991 12:36 am
Subject: Re: Physics: Separate Particles Communicate at a Distance
In article <91234.145005DOCT...@SLACVM.SLAC.STANFORD.EDU> DOCT...@SLACVM.SLAC.STANFORD.EDU (Jon J Thaler) writes:

>In response to your request for Einstein-Podolsky-Rosen references, I list
>some.  They may be too technical for your needs.  Scientific American and
>Discover (RIP) occasionally have articles on the topic, although I haven't
>seen any for 2-3 years.  Also look at the American Journal of Physics.
>[deleted]

The November 1990 issue of Discover magazine has a very readable article
called "Weird Science" which discusses EPR experiments.
--
*    Daniel A. Jimenez                  *  Please excuse my longwindedness.
*    djime...@ringer.cs.utsa.edu    *  This Sun terminal makes everything
*    da...@lonestar.utsa.edu                *  I write seem important.

    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
David M. Schiff  
View profile  
 More options Aug 23 1991, 4:15 am
Newsgroups: sci.skeptic, alt.paranormal
From: schi...@tigger.Colorado.EDU (David M. Schiff)
Date: 23 Aug 91 08:52:26 GMT
Local: Fri, Aug 23 1991 3:52 am
Subject: Re: Physics: Separate Particles Communicate at a Distance
I'm no physicist, but based on the accounts I've read
the reason most scientists believe that this effect has no implications
for paranormal phenomena is that the information which is passed seems
to be accessible only to mother nature. Measurements are not able to
extract it since each detector gives a random looking sequence of results
regardless of whether it is correlated to another detectors results.

An analogy  with 100% correlation could be thought up by imagining an experiment
involving the flipping of two fair coins which are separated by some distance.
You flip each coin, say, a million times.  However, assume they are flipped
simultaneously and that the result of each pair of flips is identical.
If coin A comes up heads, then so does coin B, and the same for tails.
If you look at the record of flips for each coin separately they are
perfectly random.  It's not until you compare each record against the other
that you can see the correlation.  Similarly, in the Aspect and Clauser
experiments the violation of Bell's inequality is only evident later when
the results are analyzed. That is, the correlation is transparent for
each individual detector.

It's like there is a private communication line that we can't tap into.
So, by itself the effect doesn't seem to offer an explanation for
paranormal phenomena.

It does seem strange though and it makes you wonder *why* nature should
be this way!


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Jan Willem Nienhuys  
View profile  
 More options Aug 23 1991, 5:11 am
Newsgroups: sci.skeptic, alt.paranormal
Followup-To: sci.skeptic
From: wsa...@rw7.urc.tue.nl (Jan Willem Nienhuys)
Date: 23 Aug 91 09:02:55 GMT
Local: Fri, Aug 23 1991 4:02 am
Subject: Re: Physics: Separate Particles Communicate at a Distance

In article <1991Aug22.190355.25...@engage.pko.dec.com> stan...@verga.enet.dec.com writes:

>In article <1991Aug22.155319.23...@pmafire.inel.gov>, rei...@pmafire.inel.gov (Steve Reiser) writes...

>>Are particles psychic?

>Well, ... I have a theory about that actually.  I think that everything is
>connected at the particle level of reality and (in my humble opinion) thats
>how psi works.

I once was in a discussion program, and the discussion leader asked me
(I was supposedly knowledgeable about physics and reincarnation):

"I want your opinion on the modern shoelace physics. I heard that in
this physics so to speak if you take a bicycle apart and take one wheel
to the railway station and the other wheel to the Dam square, and you turn
one wheel, the other will start to turn too, because they have been in the
same bicycle. Do you think this might explain the phenomenon of reincarnation?"

Sad comment: there is no limit to which beautiful and intricate physical
theories (and I suspect common facts and experiences too) can become
garbled in the mind of the New-Agers.

J.W. Nienhuys,
Research Group Discrete Mathematics
Dept. of Mathematics and Computing Science
Eindhoven University of Technology
P.O. BOX 513, 5600 MB Eindhoven
The Netherlands

e-mail: wsa...@urc.tue.nl


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Rescorla  
View profile  
 More options Aug 23 1991, 2:16 pm
Newsgroups: sci.skeptic, alt.paranormal
Followup-To: sci.skeptic
From: resco...@slack.med.upenn.edu (Rescorla)
Date: 23 Aug 91 15:09:11 GMT
Local: Fri, Aug 23 1991 10:09 am
Subject: Re: Physics: Separate Particles Communicate at a Distance
In article <1991Aug22.205906....@pmafire.inel.gov> rei...@pmafire.inel.gov (Steve Reiser) writes:

]
]The test had particles ejected in opposite direction, spin measured.
]Then one particle has spin flipped by magnetic field and spin also flips
]in particle going the opposite direction simultaneously.  That is what
]was related on the program.
Well, this DOESN'T WORK.
The conservation laws only apply in an unperturbed system.
When you flip the particle (NOT by a magnetic field, but rather by
an RF field) it has just ZERO effect on any other particle. If this
weren't true, NMR wouldn't work.
-Ekr

--
___________________________________________________________________________ ___
Eric Rescorla                                     resco...@slack.med.upenn.edu
     "No his mind is not for rent;to any God or government"-Peart/Dubois


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Rescorla  
View profile  
 More options Aug 23 1991, 2:16 pm
Newsgroups: sci.skeptic, alt.paranormal
Followup-To: sci.skeptic
From: resco...@slack.med.upenn.edu (Rescorla)
Date: 23 Aug 91 15:16:48 GMT
Local: Fri, Aug 23 1991 10:16 am
Subject: Re: Physics: Separate Particles Communicate at a Distance
In article <truesdel.682906279@sun418> trues...@sun418.nas.nasa.gov (David A. Truesdell) writes:
]DOCT...@SLACVM.SLAC.STANFORD.EDU (Jon J Thaler) writes:
]Thanks, but I already read quite a bit about EPR.  I was asking for references
]to the "experiment" that Steve Reiser was referring to, which seems to violate
]the results of other EPR experiments I have read about.  In short EPR can not
]be used to transmit information FTL, the experiment Steve refers to would seem
]to indicate that you can.
]
]So far the only references that have appeared have been to a book by a
]french "physicist/philosopher" (I wonder if "physicist" earned or simply
]claimed) and a conveniently vague ("Last several years") reference to an article
]in Sci Am.
Not only does the experiment that Steve describes violate EPR, it also
violates basic physical sense. Look at it this way. You have a pair
of previously interacted particles with opposite spin. Now, you apply a magnetic
field to induce a state splitting(standard NMR so far.) Then you apply an
rf field so that only the particle in the low energy state is exposed.
The low energy particle thus undergoes a spin transition. However, in
order to keep conservation(according to Steve) the particle in the
upper state MUST undergo a spontaneous emission. Now, there are
two problems with this:
1) You don't get any bulk absorbtion, making NMR impossible.
2) Last time I checked, spontaneous emission was forbidden without
stimulation.
-Ekr
--
___________________________________________________________________________ ___
Eric Rescorla                                     resco...@slack.med.upenn.edu
     "No his mind is not for rent;to any God or government"-Peart/Dubois

    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
stanley  
View profile  
 More options Aug 23 1991, 2:38 pm
Newsgroups: sci.skeptic, alt.paranormal
From: stan...@verga.enet.dec.com
Date: 23 Aug 91 16:12:23 GMT
Local: Fri, Aug 23 1991 11:12 am
Subject: Re: Physics: Separate Particles Communicate at a Distance

In article <1991Aug23.085226.23...@colorado.edu>, schi...@tigger.Colorado.EDU (David M. Schiff) writes...

>I'm no physicist, but based on the accounts I've read
>the reason most scientists believe that this effect has no implications
>for paranormal phenomena is that the information which is passed seems
>to be accessible only to mother nature

*We* are a part of mother nature, are we not?

>It's like there is a private communication line that we can't tap into.
>So, by itself the effect doesn't seem to offer an explanation for
>paranormal phenomena.

Maybe some of us can tap into it.  Maybe if we could tap into it... then
perhaps we could also learn to share or engage in the process ourselves
and thereby direct or control it.

---
Mary Stanley  "Wake up to find out that you are the eyes of the world"                

                (INTERNET,UUCP) stan...@verga.enet.dec.com
                (UUCP)          ...!decwrl!verga.enet!stanley
                (INTERNET)      stanley%verga.e...@decwrl.dec.com
---


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Steve Reiser  
View profile  
 More options Aug 23 1991, 2:44 pm
Newsgroups: alt.paranormal
From: rei...@pmafire.inel.gov (Steve Reiser)
Date: 23 Aug 91 15:42:47 GMT
Local: Fri, Aug 23 1991 10:42 am
Subject: Re: Physics: Separate Particles Communicate at a Distance

In article <9108222318.AA11190@aries> bonga...@aries.intel.com (Ben Bongalon) writes:

>>Kit Pedler, a Ph.D. physicist in the California bay area, had a weekly
>>program for the past year called "Mind Over Matter".  The entire series
>>was focused on a scientific approach to the paranormal.  The final

>Is this series ever shown in the San Francisco Bay Area? if so, when
>and what channel?  thanks.

I get it on the VISION network which is broadcast via satellite, so I'm
getting it on a satellite dish.

Steve

--
Steve Reiser (rei...@pmafire.inel.gov or !uunet!pmafire!reiser)


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Richard Caley  
View profile  
 More options Aug 23 1991, 3:13 pm
Newsgroups: sci.skeptic, alt.paranormal
From: r...@cstr.ed.ac.uk (Richard Caley)
Date: 23 Aug 91 17:13:45 GMT
Local: Fri, Aug 23 1991 12:13 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance

In article <1991Aug22.155319.23...@pmafire.inel.gov>, Steve Reiser (sr) writes:

sr> Kit Pedler, a Ph.D. physicist

Let's hope your repeating of what he said is very garbled, otherwise
somewher is handing out _very_ bogus physics doctorates.

sr> in the California bay area,

Well, that explains it :-).

--
r...@cstr.ed.ac.uk                  _O_
                                         |<


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Rescorla  
View profile  
 More options Aug 23 1991, 3:52 pm
Newsgroups: sci.skeptic, alt.paranormal
Followup-To: sci.skeptic
From: resco...@slack.med.upenn.edu (Rescorla)
Date: 23 Aug 91 17:17:28 GMT
Local: Fri, Aug 23 1991 12:17 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance
In article <1991Aug23.153104.9...@engage.pko.dec.com> stan...@verga.enet.dec.com writes:

]
]Maybe some of us can tap into it.  Maybe if we could tap into it... then
]perhaps we could also learn to share or engage in the process ourselves
]and thereby direct or control it.
No, I don't think so. The party line in the physics community is that
it cannot be used for communication, because the collapse cannot be dictated.
-Ekr

--
___________________________________________________________________________ ___
Eric Rescorla                                     resco...@slack.med.upenn.edu
     "No his mind is not for rent;to any God or government"-Peart/Dubois


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Jim Giles  
View profile  
 More options Aug 23 1991, 4:30 pm
Newsgroups: sci.skeptic, alt.paranormal
From: j...@cochiti.lanl.gov (Jim Giles)
Date: 23 Aug 91 18:42:46 GMT
Local: Fri, Aug 23 1991 1:42 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance
In article <1991Aug22.205906....@pmafire.inel.gov>, rei...@pmafire.inel.gov (Steve Reiser) writes:

|> [...]
|> The test had particles ejected in opposite direction, spin measured.
|> Then one particle has spin flipped by magnetic field and spin also flips
|> in particle going the opposite direction simultaneously.  That is what
|> was related on the program.

There are three possibilities here:

1) You are misreporting the statements made by the program.

2) The program was in error.

3) The experiments reported contradict all the other experiments
   relating to the EPR paradox.

The fact is that after the first measurement is made of the spin,
the particles are no longer correlated.  This has been observed
again and again.  Not only are you claiming that they remain
correlated after measurement, but after a further magnetic
interaction as well!  Such an anomolous result would surely
have made a _big_ splash in the scientific community - especially
in a place like Los Alamos (where I'm working).  There has been
no such splash.

J. Giles


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Jim Giles  
View profile  
 More options Aug 23 1991, 4:59 pm
Newsgroups: sci.skeptic, alt.paranormal
From: j...@cochiti.lanl.gov (Jim Giles)
Date: 23 Aug 91 19:00:51 GMT
Local: Fri, Aug 23 1991 2:00 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance
In article <91234.145005DOCT...@SLACVM.SLAC.STANFORD.EDU>, DOCT...@SLACVM.SLAC.STANFORD.EDU (Jon J Thaler) writes:
|> [...]
|> Most people unfortunately don't understand the scientific definition of
|> "theory."  They use it more or less interchangeably with the
|> word "speculation."

Almost.  A theory is a general statement about the way things work
which has specific testable ramifications.  Speculation, on the
other hand, may or may not have such ramifications.  Fantasy is
speculation which does not have testable consequences.  On the
far end of the spectrum is accepted theory which has been tested
repeatedly with all the precision we can achieve, has survived
all these challenges and we can't think of any new tests to
apply.  Accepted theory shades away from being considered to
be "just" speculation.  From a strict philosophical view I
suppose this shouldn't be, but people are creatures of fine
distinctions and shades of meaning which is reflected in their
use of language.

This doesn't mean that an accepted theory is *THE TRUTH*.  Some
new test may come along and contradict the theory.  Some new
theory may come along which fits experiment just as well but
is simpler to understand and apply or is applicable to wider
range of phenomena.  In either case, the accepted theory will
lose out.  Take Newtonian mechanics for example - both these
mechanisms (theoretical and experimental) were in play to
replace Newton with Einstein.

J. Giles


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Jim Giles  
View profile  
 More options Aug 23 1991, 5:30 pm
Newsgroups: sci.skeptic, alt.paranormal
From: j...@cochiti.lanl.gov (Jim Giles)
Date: 23 Aug 91 19:36:19 GMT
Local: Fri, Aug 23 1991 2:36 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance
In article <Lis479w1...@cellar.UUCP>, re...@cellar.UUCP (Brian 'Rev P-K' Siano) writes:
|> [...]
|>         The experiment requires the two particles to be speeding away from
|> each other (at the speed of light, natch); when we measure the spin of one,
|> we therefore cause the other particle to fall into the appropriate
|> eigenstate instantly.

Not quite.  My quibble is purely semantic.  It is not clear that
we _cause_ anything of the sort.  What happens is that whenever we
measure them, they do turn out to be correlated.  The reason this
is a paradox is that we can alter the polarity of the measuring
equipment so that the two measurements are separated by a timelike
interval (ie. the measurements _should_ be independent).

Well the probability that a particle will get through a polarized
target and be measured is proportional to cos(a-b) squared (where 'a'
is the orientation of the polarized target and 'b' is the orientation
of the particle spin).  The same goes for the other particle measured:
cos(c-d) squared.  Now comes the paradox.  If the two measurements
are really independent, the probability of coincident counts should
be the product of the probabilities of the separate counts.  But
they're _NOT_!  The probability of coincident counst from the
experiment is proportional to cos(a-c) squared (ie. the cosine of
the difference in polarization of the two targets).  There is, in
fact, no known continuous function of the two independent probability
distributions whose product is cos(a-c) squared (so not even hidden
variables, etc., can produce the result we see).  Since the probabil-
ities don't scale according to the product rule, the events are not
independent as we expect.

The informal language that some physicists use to describe this
phenomenon are that one measurement effects or _causes_ the other
particle to conform.  However, this is more than the evidence
justifies.  What is really happening is that the particles react
in a non-independent in some way that we don't understand.  Period.
Language such as 'eigenvector collapse' or some such implies
a _reality_ to what is really just a mathematical construct.

J. Giles

P.S.  The above description is simplified to a very low level and
yet may still not be clear to many readers who are not familiar
with the experiment.  That's all my fault for not being sufficiently
articulate to express the concept both clearly and simply.  Look
through the popular literature on the subject, but try not to take
the "collapse" rhetoric to seriously.


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
stanley  
View profile  
 More options Aug 23 1991, 5:55 pm
Newsgroups: sci.skeptic, alt.paranormal
From: stan...@verga.enet.dec.com
Date: 23 Aug 91 20:12:16 GMT
Local: Fri, Aug 23 1991 3:12 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance

In article <49...@netnews.upenn.edu>, resco...@slack.med.upenn.edu (Rescorla) writes...
>In article <1991Aug23.153104.9...@engage.pko.dec.com> stan...@verga.enet.dec.com writes:

>No, I don't think so. The party line in the physics community is that
>it cannot be used for communication, because the collapse cannot be dictated.

How do they know that for sure, Eric?  I think they are wrong.  

---
Mary Stanley            
                (INTERNET,UUCP) stan...@verga.enet.dec.com
                (UUCP)          ...!decwrl!verga.enet!stanley
                (INTERNET)      stanley%verga.e...@decwrl.dec.com
---


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
JOSEPH T CHEW  
View profile  
 More options Aug 23 1991, 10:56 pm
Newsgroups: sci.skeptic, alt.paranormal
From: jtc...@csa3.lbl.gov (JOSEPH T CHEW)
Date: 23 Aug 91 21:55:19 GMT
Local: Fri, Aug 23 1991 4:55 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance

>The November 1990 issue of Discover magazine has a very readable article
>called "Weird Science" which discusses EPR experiments.

Yeah, and when I mentioned it on sci.physics, I got a longish E-mail
from one of the Berkeley students involved in this work regarding some
flaws in the article.  Posting a request on sci.physics may elicit a
response -- I don't think I kept this message, though there may be a
printout at home.

--Joe
"Just another personal opinion from the People's Republic of Berkeley"


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Jon J Thaler  
View profile  
 More options Aug 23 1991, 11:01 pm
Newsgroups: sci.skeptic, alt.paranormal
From: DOCT...@SLACVM.SLAC.STANFORD.EDU (Jon J Thaler)
Date: 24 Aug 91 01:42:16 GMT
Local: Fri, Aug 23 1991 8:42 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance
stan...@verga.enet.dec.com says:

> schi...@tigger.Colorado.EDU (David M. Schiff) writes...
>> I'm no physicist, but based on the accounts I've read
>> the reason most scientists believe that this effect has no
>> implications for paranormal phenomena is that the information which
>> is passed seems to be accessible only to mother nature
> *We* are a part of mother nature, are we not?
>> It's like there is a private communication line that we can't tap
>> into.  So, by itself the effect doesn't seem to offer an explanation
>> for paranormal phenomena.
> Maybe some of us can tap into it.  Maybe if we could tap into it...
> then perhaps we could also learn to share or engage in the process
> ourselves and thereby direct or control it.

This whole discussion belongs more properly in sci.physics, but I will address
the issue that is relevant to paranormal phenomena.

Mary Stanley raises a valid objection to David Schiff's description of the
quantum mechanical predictions of correlations between separated particles.
In fact, if QM is correct the information mentioned above doesn't exist
at all; it's not merely inaccessable.  QM is sometimes referred to as
a nonrealistic (good term, yes?) theory.  When a measurement is made, and
the wave function collapses, *THEN* the information exists, but only the
person who made the measurement has the information, and it must be
transmitted by conventional means.

So, this doesn't have any necessary bearing on telepathy or clairvoyance,
unless the information transfer is thought to be instantaneous.  One could
imagine prosaic explanations for an observed paranormal phenomenon, but
if it is the one suggested by Mary Stanley, then QM is wrong.

For any would-be flamers:  I'm not claiming that this means that these
phenomena are impossible, but (IMO) an explanation which requires the
overthrow of a rather well tested theory is unlikely to be the correct one.


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Jim Giles  
View profile  
 More options Aug 23 1991, 11:03 pm
Newsgroups: sci.skeptic, alt.paranormal
From: j...@cochiti.lanl.gov (Jim Giles)
Date: 23 Aug 91 23:03:50 GMT
Local: Fri, Aug 23 1991 6:03 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance
Oh, I forgot to mention.  After the photons have passed through the
polarizing filters at A and/or C, they are no longer spin-correlated.
The interaction with the filter either absorbs the photon and doesn't
pass it through at all or it passes it through with a new polarization
(which matches the orientation of the filter itself).  There is no
continues correlation between the particles.

J. Giles

P.S.  I also just noticed that my spelling is getting worse instead
of better and I probably spelled 'particle' as 'partical' all the way
through the last post.  Wish I had the same text editor I had at home
with a spell checker built-in.


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Jim Giles  
View profile  
 More options Aug 23 1991, 11:21 pm
Newsgroups: sci.skeptic, alt.paranormal
From: j...@cochiti.lanl.gov (Jim Giles)
Date: 23 Aug 91 22:16:20 GMT
Local: Fri, Aug 23 1991 5:16 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance
In article <1991Aug23.191643.14...@engage.pko.dec.com>, stan...@verga.enet.dec.com writes:

|>
|> In article <49...@netnews.upenn.edu>, resco...@slack.med.upenn.edu (Rescorla) writes...
|> >
|> >No, I don't think so. The party line in the physics community is that
|> >it cannot be used for communication, because the collapse cannot be dictated.
|> >
|>
|> How do they know that for sure, Eric?  I think they are wrong.

I don't know what you mean by "I think they are wrong."  Does this
mean that you have actually studied the EPR paradox and have found
a way of using it to send messages?  If not, then your use of the
word "think" is contradicts the common definition of the word.

The Aspect experiment goes as follows (I will use photons, an
analogous argument would apply to any other QM particle).

Consider the following apparatus:

            |                       *                        |
            A                       B                        C

At point B, there is a source of photons that were produced by a
QM interaction which sends out photons in (almost) opposite
directions with (exactly) opposite spins.  At points A and C
there are polarizing filters and photon detectors.  The polarizing
filters are built so that they can be rotated quickly.  The angle
that the filter at A makes with the vertical we'll call 'a', and
the angle the filter at C makes with the vertical we'll call 'c'.
Those photons which make it through the filter will cause the
photon detector to register a "count".  The probability that
the detector at A will register a count when the source fires
is a function of 'a' and of 'b1' (which is the polarization of
the spin of the photon which goes left).  The probability that
the detector at C will register a count when the source fires
is a function of 'c' and 'b2' ('b2' is the negative of 'b1' and
is the polarity of the photon which goes right).

The probability densities observed at A and C are given by the
following expressions:
                2
        Pa = cos (a-b1)/2

                2
        Pc = cos (c-b2)/2

However, since the spin orientation of the photons is QM produced,
it is _random_.  So all the observar at A sees is the _average_
number of events that get through.  The average over all possible
spins is:
        __               2
        Pa = integral(cos (a-b1)/2, db1)/2*pi

And this value is 0.5.  That is, half the times that the source
fires, there is a count at A.  The same applies to C, half the
times the source fires, there is a count.  This is true no matter
the observers rotate their polarized filters.  The result is
a count density of 0.5 independent of 'a' or 'c'.  However, _after_
the experiment is done and the two observers get together to compare
notes, they will find that the probability density of _coincident_
counts (the times when _both) observers got a count on the same
firing of the source) is:
               2
        P = cos (a-c)/2

That is, the probability density of _coincident_ counts is related
only to the orientations of the two filters and not dependent on
the photons at all.

This is the EPR paradox (ie. that 'P' is not the product of 'Pa' and
'Pc').  If you can discover a method of transmitting a message using
this phenomenon, please tell the rest of us - no one else has done it.

J. Giles

Note that the above description does not say anything about "collapse"
or "superposition of states" or "faster than light interaction."  None
of these concepts are required to describe or understand the phenomenon.
None of these exotic things has ever been observed or measured.


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Rescorla  
View profile  
 More options Aug 23 1991, 11:23 pm
Newsgroups: sci.skeptic, alt.paranormal
Followup-To: sci.skeptic
From: resco...@slack.med.upenn.edu (Rescorla)
Date: 23 Aug 91 21:04:59 GMT
Local: Fri, Aug 23 1991 4:04 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance
In article <1991Aug23.191643.14...@engage.pko.dec.com> stan...@verga.enet.dec.com writes:

]
]In article <49...@netnews.upenn.edu>, resco...@slack.med.upenn.edu (Rescorla) writes...
]>In article <1991Aug23.153104.9...@engage.pko.dec.com> stan...@verga.enet.dec.com writes:
]>
]>No, I don't think so. The party line in the physics community is that
]>it cannot be used for communication, because the collapse cannot be dictated.
]How do they know that for sure, Eric?  I think they are wrong.  
What reasons do you have for thinking that they are wrong?
Sure you can MAKE the wavefunction do what you want, but not without
breaking the correlation between the particles. In fact, I am told
that Aspect's experiments show that the measurement itself breaks said
correlation.
   This question is basically along the lines of "well, if you can't prove
it CAN'T be done, it must be true." What I'll say is this: Nobody has
yet proposed a mechanism by which EPR type experiments could be used
for communication. Propose one, and I'll tell you why it doesn't work.
-Ekr
--
___________________________________________________________________________ ___
Eric Rescorla                                     resco...@slack.med.upenn.edu
     "No his mind is not for rent;to any God or government"-Peart/Dubois

    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Discussion subject changed to "definition of parapsychology" by ed...@verifone.com
ed_l1  
View profile  
 More options Aug 23 1991, 11:27 pm
Newsgroups: sci.skeptic, alt.paranormal
From: ed...@verifone.com
Date: 23 Aug 91 18:07:55 GMT
Local: Fri, Aug 23 1991 1:07 pm
Subject: Re: definition of parapsychology
In article <91232.092806DOCT...@SLACVM.SLAC.STANFORD.EDU>, DOCT...@SLACVM.SLAC.STANFORD.EDU (Jon J Thaler) writes:

> rei...@pmafire.inel.gov (Steve Reiser) says:

>> Reality is created by consciousness.

> As a general philosophical position, this is untenable.  Notwithstanding
> claims to the contrary, it is not even true in quantum mechanics.  I would
> agree that one's _interpretation_ of reality might depend on the nature of
> one's consciousness.  The conscious inhabitants of another planet might view
> reality in a different way.

Jon, as soon as we perceive reality, we involve consciousness.  there just
ain't no other way to do it.  Your paragraph contradicts itself.
Even if you used measuring tools, you use consciousness to perceive the
results thereof.  All we got is our interpretations of reality.

>> A consciousness that does not
>> believe in ESP, etc. has already been proven to create interference with
>> existing psychic abilities.  Go look it up in the Handbook of
>> Parapsychology.

> I am perfectly willing to allow the that the presence of a skeptical
> observer might interfere with a PSI phenomenon.  However, that doesn't
> eliminate the need for controls on the quality of the experimental
> technique.  (Examples: The use of automated data recording should be
> OK, and the discarding of 'bad' data is still a bad practice.)  It
> also doesn't give free license to credulously accept all claims of
> paranormal effects.  Most commonly the "skeptical interference"
> argument is made by people like Uri Geller, whose claims wither
> under the light of scrutiny.

And gee, that sure contradicts the slamming I got the other day (from
you among others) for saying the same thing.  Put some of your own
experimental controls on your statements!  Skeptics are showing their
true colors.

For the record: I believe that there should be good experimental controls
on PSI experiments, including having skeptics there and skeptics not there
to see what difference it makes (though as Steve has mentioned, that
experiment has already been done and shown to have the effect I mentioned.)

There is a difference between giving free license to all paranormal claims
and accepting that PSI is possible.  I'm sure there's probably an equal
number of phony skeptics as there are phony psychics.

--
***************************************************************************
*  Ed L'Esperance - P.O. Box 4635, Kane`ohe, Hawai`i 96744  U.S.A.        *
*  Anthropologist, Writer, Editor, etc.  -*-  UUCP%"Ed...@VeriFone.Com"   *
*  Disclaimer: Opinions Copyright 1991 Ed L'Esperance.     HANDS OFF!     *
*  Opinion #1: "Are you trying to tell me that these people are SERIOUS?" *
*  #2: "What do you mean 'just opinions?' -- that's all anyone has!"      *
*  #3: "'It's not my fault!'"  (Quoted from Han Solo, Star Wars Saga)     *
***************************************************************************


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Discussion subject changed to "Physics: Separate Particles Communicate at a Distance" by Lewis E. Wolfgang
Lewis E. Wolfgang  
View profile  
 More options Aug 25 1991, 4:05 am
Newsgroups: sci.skeptic, alt.paranormal
From: wolfg...@rigel.nosc.mil (Lewis E. Wolfgang)
Date: 24 Aug 91 17:08:59 GMT
Local: Sat, Aug 24 1991 12:08 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance
I showed the first article of this thread to Dr. Richard Shockley
(yes, the son of THAT Dr. Shockley).  We had discussed this subject
in the past and I thought that he would have something interesting
to say about it.  He agreed to write up a short summary, which
follows:

     On the EPR Paradox

          The spin correlation experiments occasionally discussed
     in articles for lay readers are rightly known as Einstein-
     Rosen-Podolsky (EPR) experiments, and the results are the EPR
     paradox.

          Einstein was not enamored of the interpretation of quantum
     mechanics in which particles were treated as "systems," meaning
     a particle was held to be associated with a quantum mechanical
     state which was a sum (superposition) of eigenstates, with each
     eigenstate being the state which would always give a particular
     value of a measurement, and the mixture of states meant that a
     measurement was not perfectly predictable, and would, for iden-
     tically prepared systems, yield different results with probabil-
     ities related to how much of each state was present.  The key
     offending word is "probability."  "Der Herrgott wurfelt nicht,"
     is German for "God doesn't gamble," and is supposedly Einstein's
     rejection of the probabilistic interpretation of quantum mechan-
     ics.

         If the above is incomprehensible, we can restate it as fol-
     lows:  In quantum mechanics (QM) we regard a particle as being
     described by a vector.  You can think of a vector as having an
     x-component, a y-component, etc.  The state, or vector, associ-
     ated with a particle is the sum of the component vectors in each
     basis direction (x, y, etc.).  If the state is all in the x-direc-
     tion, a measurement gives x as a result.  If it's all in the
     y-direction, a measurement gives y as a result.  If the particle
     is a sum of components, the measurement will give different re-  
     sults each time you do it, with probabilities determined by the
     amplitude in the x-direction, the y-direction, etc.

         An electron is supposed to a superposition of states, and
     you could chose energy eigenstates for the case of the hydrogen
     atom, for example.  Unless the electron is carefully prepared to
     be in some particular energy eigenstate, it's possible that a
     measurement on the same system (identically prepared systems)
     will give different results each time it is made.

         Einstein said, "Wrong."  Take the case of spin.  Spin is
     quantized.  When you measure it along the z-axis, you find it
     it is either +1 or -1 (more precisely, +/- 0.5 times Planck's
     constant).  If you think an electron is a sum of states, then
     how could a pair of electrons emitted from a decay-process in
     which the total angular momentum is conserved, so the electrons
     must have opposite spins, decide on who had what?  You do not
     determine the spin of an electron until the measurement.  Prior
     to the measurement, it is supposed to be a superposition of
     states.  You make the measurement, the electron must decide
     which way to go, and for a short time thereafter (until it is
     perturbed by interaction with some physical entity) it stays
     in that state.  This is absurd, because it means that I could
     make a measurement on one electron and QM would say the other
     electron, instantaneously, even if it is 14.23 zillion miles
     away, knows what state it must be in.  That is the Einstein-
     Rosen-Podolsky experiment.  Emit two particles with zero net
     spin, let them fly well apart, and measure their spins.

         On the basis of solid, unquestionable premises (nothing
     goes faster than light; Boolean logic, e.g., propositional
     calculus, holds; and reality exists), Bell derived an inequali-
     ty pertaining to the spin-spin correlation experiments.  The
     inequality referred to probabilities of outcomes of the experi-
     ment.  The inequality was testable experimentally.  The ine-
     quality disagreed with the predictions of QM.  Nature obeys
     the QM result, to the best of our knowledge.

         There are articles in Scientific American on the EPR para-
     dox in which the experimental results, Bell's inequality, and
     possible resolutions are discussed.  

         Spin measurements use a Stern-Gerlach device, and are called
     Stern-Gerlach experiments.  It does not flip the spin of the
     electron, but rather tells you what its spin was.  Spin-up
     electrons get pushed up, and spin-down ones get pushed down.
     You see the spot the electron makes on the screen at the output
     of the Stern-Gerlach device.

         The EPR paradox is not the only paradox in QM.  Others are
     equally resistant to analysis.  The extended (to  relativistic
     electrons) version of QM, the Dirac equation, also called quan-
     tum electrodynamics, or QCD, predicts spin, which is stunning.  
     In nonrelativistic QM, spin is put in ad-hoc.  QCD is the most
     accurately tested theory in physics.  No violations from the
     predictions of Dirac's equation have been observed.  The Dirac
     equation also predicts anti-matter and vacuum breakdown, or
     pair-production, in agreement with experiment.  The Dirac equa-
     treats the electron as a point.  How can something with no ra-
     dial extent spin?  And how does vacuum know to quantize itself
     always into electrons and positrons, instead of some fraction
     of an electron, when it breaks down?  "The bodies of many good
     physicists lie wrecked on the shores of the Dirac equation."
     (J.H. Marburger III)

                                Dr. Richard C. Shockley

Me again.  If anyone feels driven to contact us by E-mail,  don't
use the return address in the header, it may be wrong.  I will try
to get Dick personally involved with Usenet, but 'till then I will
serve as a point-of-contact.

                                Lewie Wolfgang
        Use this address..      wolfg...@nosc.mil


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Brian 'Rev P-K' Siano  
View profile  
 More options Aug 25 1991, 4:08 am
Newsgroups: sci.skeptic, alt.paranormal
From: re...@cellar.UUCP (Brian 'Rev P-K' Siano)
Date: 24 Aug 91 19:52:36 GMT
Local: Sat, Aug 24 1991 2:52 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance

stan...@verga.enet.dec.com writes:

> In article <49...@netnews.upenn.edu>, resco...@slack.med.upenn.edu (Rescorla)
> >In article <1991Aug23.153104.9...@engage.pko.dec.com> stan...@verga.enet.dec

> >No, I don't think so. The party line in the physics community is that
> >it cannot be used for communication, because the collapse cannot be dictated

> How do they know that for sure, Eric?  I think they are wrong.  

> ---

        Well, that settles THAT.

""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
Brian Siano,                                Delaware Valley Skeptics
Rev. Philosopher-King of The First Church of the Divine Otis Redding
re...@Cellar.UUCP                     "Ecrasez l'enfame!" - Voltaire
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Richard Caley  
View profile  
 More options Aug 26 1991, 1:19 am
Newsgroups: sci.skeptic, alt.paranormal
From: r...@cstr.ed.ac.uk (Richard Caley)
Date: 25 Aug 91 22:02:07 GMT
Local: Sun, Aug 25 1991 5:02 pm
Subject: Re: Physics: Separate Particles Communicate at a Distance

In article <1991Aug23.191643.14...@engage.pko.dec.com>, stanley  (s) writes:
In article <49...@netnews.upenn.edu>, resco...@slack.med.upenn.edu (Rescorla) writes...

r> The party line in the physics community is that it cannot be used
r> for communication, because the collapse cannot be dictated.

s> How do they know that for sure, Eric?  I think they are wrong.  

So, we are to presume that you are in secret negotiations with a major
telecmunications multinational to have them market your amazing
discoverry? When is the paper coming out and in which journal?

--
r...@cstr.ed.ac.uk                  _O_
                                         |<


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Discussion subject changed to "Context/apologies/was Doctor PSI" by ed...@verifone.com
ed_l1  
View profile  
 More options Aug 26 1991, 3:39 pm
Newsgroups: sci.skeptic, alt.paranormal
From: ed...@verifone.com
Date: 26 Aug 91 19:31:45 GMT
Local: Mon, Aug 26 1991 2:31 pm
Subject: Context/apologies/was Doctor PSI
In article <91234.003805DOCT...@SLACVM.SLAC.STANFORD.EDU>, DOCT...@SLACVM.SLAC.STANFORD.EDU (Jon J Thaler) writes:

> In article <1991Aug21.121548.2...@verifone.com>, ed...@verifone.com says:

>>DOCT...@SLACVM.SLAC.STANFORD.EDU (Jon J Thaler) writes:
>>>> ...
>>>>I have not seen any statements for six months that I've been
>>>>participating in this greoup that "we _shouldn't research PSI."
>>>>Nevertheless, Ed L brings up this point in about half of his posts.
>>>>Does he have a need to feel persecuted?

>>Oh yes, whip me, beat me.
>>Just don't infer things that aren't true by taking me out of context like
>>this self-proclaimed doctor does....

> I challenge you to show me how I am taking you out of context.
> Unfortunately, I'm not.

Yes. I said in my original post,
"So, is there anyone out there who says we shouldn't research PSI?"

You can go back to the original post and check it yourself.  Plus it
doesn't appear in half my posts (yawn, this is getting BORING!).
What you wrote was that I was inferring that someone was saying that
PSI shouldn't be researched.  Not at all what I said.

> By the way, it has been about four months now since several of us
> requested information from you about your claimed persecution (by the
> Bay Area Skeptics) of someone who wanted to teach about the paranormal
> at the U of Hawaii.  Are you planning to respond?  Or is this just another
> one or your "you skeptics are persecuting us" smokescreens?

I have attempted to get information, but have been blocked on several
fronts since releasing the information is a violation of privacy.
Another source promised to release some of it that it public, but has
not dropped everything to do it.  Plus, I work for a living, and don't
have as much time to follow up as some of you evidently do.

I did get one name, however, of one of the persecuters: Victor Stenger,
who allegedly has some UH ties, and who was the invoker of names that
I was quoting (or possibly mis-quoting, I have already admitted).

In any case, so many skeptics seem to know so much more about it than
I; why don't those who know provide the info?  Instead of saying
"prove it" why don't you tell it like it is? If it wasn't the BAS, then
what skeptics group _did_ V.S. invoke?  Or is it too much to expect
that skeptics can deal in truth?

Prove me wrong, and your apology will be forthcoming.  I'm reasonable.

--
***************************************************************************
*  Ed L'Esperance - P.O. Box 4635, Kane`ohe, Hawai`i 96744  U.S.A.        *
*  Anthropologist, Writer, Editor, etc.  -*-  UUCP%"Ed...@VeriFone.Com"   *
*  Disclaimer: Opinions Copyright 1991 Ed L'Esperance.     HANDS OFF!     *
*  Opinion #1: "Are you trying to tell me that these people are SERIOUS?" *
*  #2: "What do you mean 'just opinions?' -- that's all anyone has!"      *
*    Quote of the Eon: "It's not my fault!"  (Han Solo, Star Wars Saga)   *
***************************************************************************


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Discussion subject changed to "Physics: Separate Particles Communicate at a Distance" by Grant B. Edwards,E,3240,
Grant B. Edwards,E,3240,  
View profile  
 More options Aug 27 1991, 3:16 pm
Newsgroups: sci.skeptic, alt.paranormal
From: gra...@hydro.samsung.com (Grant B. Edwards,E,3240,)
Date: 27 Aug 91 16:46:50 GMT
Local: Tues, Aug 27 1991 11:46 am
Subject: Re: Physics: Separate Particles Communicate at a Distance
From article <1991Aug23.191643.14...@engage.pko.dec.com>, by stan...@verga.enet.dec.com:

> How do they know that for sure, Eric?  I think they are wrong.  

(Mary thinks that the EPR paradox can be used to transmit information
faster than light)

Why do you think this???  Have you talked to, or heard of, anybody who
has used QM to transmit information FTL?  Can you or anybody else
duplicate the results?  If somebody has done this, why do I have to
suffer the annoying propogation delays in circuits I build and phone
calls I make to Europe?

Get REAL

--
gra...@hydro.rosemount.com                         Oh I used to be disgusted,
                                                  And now I try to be amused.
Rosemount Inc, CB7                   But since their wings have gotten rusty,
12001 Technology Drive         You know the angels want to wear my red shoes.
Eden Prairie, MN  55344                                      - Elvis Costello


    Reply to author    Forward  
You must Sign in before you can post messages.
To post a message you must first join this group.
Please update your nickname on the subscription settings page before posting.
You do not have the permission required to post.
Messages 51 - 75 of 86 < Older  Newer >
« Back to Discussions « Newer topic     Older topic »

Create a group - Google Groups - Google Home - Terms of Service - Privacy Policy
©2009 Google