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- Path: sparky!uunet!news.centerline.com!franl
- From: franl@centerline.com (Fran Litterio)
- Newsgroups: sci.physics
- Subject: Re: hidden variables
- Date: 22 Jan 93 14:41:27
- Organization: CenterLine Software R&D
- Lines: 34
- Message-ID: <FRANL.93Jan22144127@draco.centerline.com>
- References: <1993Jan22.133037.6880@oracorp.com>
- NNTP-Posting-Host: 140.239.3.116
- In-reply-to: daryl@oracorp.com's message of Fri, 22 Jan 1993 13:30:37 GMT
-
- daryl@oracorp.com (Daryl McCullough) writes:
-
- > paul@mtnmath.UUCP (Paul Budnik) writes:
- >
- > > franl@centerline.com writes:
- > > > In a sense, the wavefunction encodes instantaneous
- > > > knowledge of distant events, since a point in phase space encodes
- > > > information about physically separate quantum states at a sinlge point
- > > > in time (in a given frame of reference).
-
- > > One is forced to use phase space because the wave functions for two
- > > separate particles will overlap in physical space. One needs some method
- > > to represent the probability of finding particle A at location A1 and
- > > particle B at location B1. One cannot represent this without using a phase
- > > space that includes position coordinates for both particles.
- >
- > No, that's not true. In the case of identical particles, one can do
- > without phase space by just using the particle density, which gives
- > the expected number of particles in a unit volume. Phase space is only
- > needed for distant correlations between particles. It is precisely the
- > violation of Bell's inequality that forces the use of phase space for
- > describing quantum mechanics. If quantum mechanics obeyed Bell's
- > inequalities, then there would be a local description of quantum
- > mechanics that does not use phase space.
-
- That sounds like putting the cart before the horse. Shouldn't we
- instead say that "the use of phase space for describing quantum
- mechanics" forces QM's prediction of "the violation of Bell's
- inequality"?
- --
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