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- Xref: sparky alt.sci.physics.new-theories:2594 sci.physics:21671
- Path: sparky!uunet!think.com!news!columbus
- From: columbus@strident.think.com (Michael Weiss)
- Newsgroups: alt.sci.physics.new-theories,sci.physics
- Subject: Re: The Theories are Full of Holes
- Date: 23 Dec 92 11:52:42
- Organization: Thinking Machines Corporation, Cambridge MA, USA
- Lines: 16
- Message-ID: <COLUMBUS.92Dec23115242@strident.think.com>
- References: <BzK695.CL5@csn.org> <1992Dec20.195242.26459@galois.mit.edu>
- NNTP-Posting-Host: strident.think.com
- In-reply-to: jbaez@riesz.mit.edu's message of Sun, 20 Dec 92 19:52:42 GMT
-
- In article <1992Dec20.195242.26459@galois.mit.edu> jbaez@riesz.mit.edu
- (John C. Baez) writes:
-
- The
- explanation for what Dirac did wrong is rather technical; mathematically
- speaking, he chose the wrong complex structure for the Hilbert space of
- solutions of the Dirac equation, so the Hamiltonian (energy) was
- unbounded below, and then to wriggle out of the problem he postulated
- that all these negative-energy states were filled in the vacuum state.
- These days, people who are sharp realize that there is another complex
- structure on the Hilbert space of solutions, such that the Hamiltonian
- *is* bounded below.
-
- Elaborate a little, please! What do you mean by "complex structure"? The
- scalar product (i.e., the action of C on the Hilbert space)? The inner
- product? What?
-