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- From: weemba@sagi.wistar.upenn.edu (Matthew P Wiener)
- Newsgroups: sci.physics
- Subject: Re: Recent article on QM in AJP
- Keywords: QM, correspondence principle, Arnol'd cat
- Message-ID: <103469@netnews.upenn.edu>
- Date: 31 Dec 92 17:01:53 GMT
- References: <1992Dec31.081559.11949@netcom.com>
- Sender: news@netnews.upenn.edu
- Reply-To: weemba@sagi.wistar.upenn.edu (Matthew P Wiener)
- Organization: The Wistar Institute of Anatomy and Biology
- Lines: 19
- Nntp-Posting-Host: sagi.wistar.upenn.edu
- In-reply-to: marki@netcom.com (Mark N. Iverson)
-
- In article <1992Dec31.081559.11949@netcom.com>, marki@netcom (Mark N. Iverson) writes:
- > "Does quantum mechanics obey the correspondence principle?
- > Is it complete?"
-
- > Joseph Ford and Giorgio Mantica
-
- > Am. J. Phys. 60 (12), December 1992
-
- I was unimpressed by the earlier Ford, Mantica, Ristow "The Arnol'd cat:
- Failure of the correspondence principle" PHYSICA D 50:493 (1991). It was
- a clever derivation of some algorithm complexity involved in the Arnol'd
- cat, before and after quantizing. While neat, it depends on distinguish-
- ing the rational numbers from the irrationals, and just saying (his FAQ
- response, p519) that quantum mechanics permits arbitrarily precise measure-
- ments doesn't address this. His further correctly identifying the real
- issue in the question is the distinguishing the random from the non-random
- doesn't tell us how to make this physical either.
- --
- -Matthew P Wiener (weemba@sagi.wistar.upenn.edu)
-