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- Newsgroups: sci.physics
- Path: sparky!uunet!spool.mu.edu!agate!usenet.ins.cwru.edu!wsu-cs!igor.physics.wayne.edu!atems
- From: atems@igor.physics.wayne.edu (Dale Atems)
- Subject: Re: hidden variables
- Message-ID: <1993Jan26.061120.19568@cs.wayne.edu>
- Sender: usenet@cs.wayne.edu (Usenet News)
- Organization: Wayne State University, Detroit, MI
- References: <1993Jan21.000329.21085@cs.wayne.edu> <1993Jan25.053921.11702@cs.wayne.edu> <518@mtnmath.UUCP>
- Date: Tue, 26 Jan 1993 06:11:20 GMT
- Lines: 57
-
- In article <518@mtnmath.UUCP> paul@mtnmath.UUCP (Paul Budnik) writes:
- >In article <1993Jan25.053921.11702@cs.wayne.edu>, atems@igor.physics.wayne.edu
- (Dale Atems) writes:
- >> In article <515@mtnmath.UUCP> paul@mtnmath.UUCP (Paul Budnik) writes:
- >> >[...]
- >> >The Relativistic
- >> >Schrodinger equation is local and Lorentz invariant. One cannot derive
- >> >such effects using that equation.
- >>
- >> This argument looks like a rather clever sleight of hand to me. The
- >> last statement requires a proof. While it's certainly true that one
- >> cannot use that equation to obtain an instantaneous change in the wave
- >> function at a given location due to a change in a distant polarizer
- >> angle, it's not at all obvious to me that you need this in order to
- >> describe what is happening. Maybe I'm missing something.
- >
- >You do need an instantaneous change in the wave function that is
- >influenced by a distant polarizer angle to get the predictions of QM.
- >You can prove this. In effect that is what Eberhard did.
-
- Eberhard's proof says nothing about wave functions. It does refer to
- the results of measurements, and the wave function by itself does
- not determine the results of any measurement.
-
- >Eberhard proved
- >that the observed experimental results depend on the setting of a distant
- >polarizer.
-
- So far I agree. In fact, the joint probabilities predicted by QM
- *do* depend on both settings.
-
- >In QM predictions about this observation are completely
- >determined by the wave function. Thus the wavefunction itself must
- >be dependent on (or be a function of) the distant polarizer angle.
-
- No, I think you have that wrong. One needs to project the wave
- function onto a basis set to obtain probabilities, and that, I
- believe, is where the functional dependence comes in.
-
- >> I've already shown that the nonlocal dependence required by Eberhard's
- >> proof is implicitly contained in the rotational invariance of the
- >> singlet state.
- >
- >This is false. Without talking about time delays you cannot prove anything
- >about locality.[...]
-
- The conditions for Eberhard's proof have nothing to do with time
- delays. The time delay becomes relevant only when we discuss the
- significance of the violation of the inequality Eberhard derived.
- I consider it an important issue as well, and I'm trying to
- address it in my other series of posts.
-
- ------
- Dale Atems
- Wayne State University, Detroit, MI
- Department of Physics and Astronomy
- atems@igor.physics.wayne.edu
-