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- From: jbaez@riesz.mit.edu (John C. Baez)
- Newsgroups: sci.physics
- Subject: Re: Link invariants and gauge theory
- Message-ID: <1992Dec21.201343.5382@galois.mit.edu>
- Date: 21 Dec 92 20:13:43 GMT
- References: <24502@galaxy.ucr.edu> <1992Dec21.063339.27448@nuscc.nus.sg> <BzMAyM.Du2@news.cso.uiuc.edu>
- Sender: news@galois.mit.edu
- Organization: MIT Department of Mathematics, Cambridge, MA
- Lines: 22
- Nntp-Posting-Host: riesz
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- In article <BzMAyM.Du2@news.cso.uiuc.edu> marty@amaterasu.physics.uiuc.edu (Marty Gelfand) writes:
- >In article <1992Dec21.063339.27448@nuscc.nus.sg> matmcinn@nuscc.nus.sg (Brett McInnes) writes:
- >>Can anyone
- >> [a] give me an example of a theory that is *not* diffeomorphism invariant
- >> [b] explain to me whether "real" physicists "really" care about
- >>Chern-Simonsology [meaning: do they actually have a concrete use for it,
- >>or is it something that people do while waiting for the next theory of
- >>everything to come along?]
- >> ps I have no objection either to mathematical physics with no obvious
- >>applications, or to things like conformal field theory that are
- >>interesting but of no real use. Nor am I of the school who say say "so
- >>what" when informed of the relationship between knot theory and QFT. I ask
- >>merely for information.
- > Hey, who says conformal field theory is of no real use??? Down here
- >in low-energy physics it has been fruitful in problems such as
- >quantum spin chains, multichannel Kondo systems, and 2D finite-temperature
- >critical phenomena (including random systems).
-
- What string theorists can only dream of, condensed matter theorists can
- check out in the lab! Any descriptions of condensed matter theory
- research, especially relating to conformal field theory and Chern-Simons
- theory, would be received with great pleasure!!
-