Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!utgpu!water!watmath!clyde!rutgers!husc6!ut-sally!turpin From: turpin@ut-sally.UUCP Newsgroups: sci.physics,sci.philosophy.tech Subject: Re: Yet Another EPR Question Message-ID: <8195@ut-sally.UUCP> Date: Thu, 4-Jun-87 10:13:07 EDT Article-I.D.: ut-sally.8195 Posted: Thu Jun 4 10:13:07 1987 Date-Received: Sat, 6-Jun-87 07:45:35 EDT References: <422@telesoft.UUCP> <1205@batcomputer.tn.cornell.edu> <7407@boring.cwi.nl> Organization: U. Texas CS Dept., Austin, Texas Lines: 33 Xref: utgpu sci.physics:1497 sci.philosophy.tech:142 Summary: Many Worlds Interpretation does have experimental results! In article <7407@boring.cwi.nl>, lambert@cwi.nl (Lambert Meertens) writes: > In article <5925@brl-smoke.ARPA> gwyn@brl.arpa (Doug Gwyn (VLD/VMB) ) > replies: > > No. The "many-worlds" interpretation has been known for quite some > > time to make the same predictions as the Copenhagen interpretation. Well, no. When the Everett-DeWitt many-worlds interpretation was first proposed, the common view was that it was "merely" an alternate interpretation, and therefore instrumentally isomorphic with other interpretations. In recent years, some physicists have disputed this. In particular, David Deutsch, a young British physicist, has published several papers describing experiments that differentiate the many-worlds interpretation from the standard interpretation. See, for example: David Deutsch, "Three connections between Everett's interpretation and experiment," which appears as chapter 14 of Quantum Concepts in Space and Time, Clarendon Press, 1986, edited by Penrose and Isham. The supporters of MWI claim it is a purer quantum theory. In MWI, the change of a system through time can always be described by Schrodinger evolution. Under the standard interpretation, Schrodinger evolution is interrupted by periods of wave collapse. There is no universely accepted principle for determining when this wave collapse must occur, except it must take place after the last chance for wave interference and before human observation. The above book has several interesting chapters discussing quantum interpretations. Russell