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- Newsgroups: sci.physics
- Path: sparky!uunet!seas.smu.edu!vivaldi!aslws01!aslws01!terry
- From: terry@aslws01.asl.dl.nec.com (Terry Bollinger)
- Subject: Bell's Inequality [was: drifting like Finnegan's Wake, IMHO...]
- Message-ID: <1992Sep12.215812.12995@asl.dl.nec.com>
- Sender: news@asl.dl.nec.com
- Nntp-Posting-Host: aslws01
- Organization: NEC America, Inc. Irving, Texas
- References: <1992Sep5.071519.16554@asl.dl.nec.com> <1992Sep12.020632.9597@galois.mit.edu> <272@mtnmath.UUCP>
- Date: Sat, 12 Sep 1992 21:58:12 GMT
- Lines: 66
-
- In article <272@mtnmath.UUCP> paul@mtnmath.UUCP (Paul Budnik) writes:
-
- > In an experimental tests of Bell's inequality manipulations of a local
- > polarizer must instantaneously influence results obtained by a distant
- > observer or Bell's inequality cannot be violated...
- > [which] by standard definitions, involves the transfer of information ...
- >
- > [Does Dr. Baez] disagree?
-
- Whose "standard definition" is that? I don't know what kind of work you do,
- but in computer science and telecommunications we're a rather pragmatic lot
- about such things. As in, "If I cannot use Mechanism X to transmit some
- series of bits known only to me to some other location, we most certainly
- do NOT call such a thing a 'transfer of information,' no matter how many
- funny 'non-local' effects it may exhibit."
-
- Our kind of defintion that is based on whether you can demonstrate it to
- a customer and make money off of it by selling her or him a working system.
- If you feel that your definition of transfer of information can do that
- for you, more power to you -- but if your newfangled telephone is going to
- be based on Bell's Inequality, I for one won't be panting to buy any stock.
-
- I've read Bell's delightful book "Speakable and Unspeakable in Quantum
- Mechanics" a couple of times, and I flat-out do not understand why people
- keep insisting on trying to view it as some kind of magical information
- transfer mechanism. It isn't. It IS "non-local" in the precisely defined
- sense that Dr. Bell gave in that same book (a nice, clear light-cone-based
- defintion that is well worth reading over), but the whole reason Dr. Bell
- went over that issue was to sharpen up the distinction between non-locality
- and transfer of information. They are simply not the same thing.
-
- Non-locality is fascinating and bizarre, yes. Dr. Einstein absolutely
- hated it. Indeed, Dr. Bell argues that it was really non-locality,
- not determinism per se, that drove him to argue with Dr. Bohr about the
- underpinnings of QM quite literally until the day before Dr. Bohr died.
-
-
- Nor is Bell's Inequality fully resolved. For example...
-
- You used the word "instantaneous." Talk about undefined words! Special
- relativity flatly does not *allow* such words, because they cannot be
- defined or quantified. Depending on your inertial frame, it could be
- *either* observer A or observer B in a Bell experiment who "caused" any
- particular "wave collapse."
-
- So what DO commonly used phrases such as "instantaneous influence" mean
- for Bell Inequality experiments? To the best of my knowledge, no one
- knows. Nor (apparently) has one has ever come up with a truly consistent
- mathematical quantification of such strange questions. (My recollection
- is that there were some rather unsuccessful attempts in the early 80s --
- anyone?)
-
- Bottom line is that while there quite probably ARE some rather profound
- mysteries still lurking in non-locality ala Bell, no one has ever developed
- a truly sound framework for figuring out what they are.
-
- But they don't appear to be telephones. Not the last time I checked.
-
- Cheers,
- Terry Bollinger, Telecommunications Twerp
-
-
- P.S. -- Dr. Baez: Thanks for the nice Third Try input. Believe you may
- have a small boo-boo in it, but it's a good shot & I will try to
- fully decipher it a bit later. (Very busy with my "real" work.)
-
-