Quantum-spin-chain realizations of conformal field theories

Sen, Diptiman (1991) Quantum-spin-chain realizations of conformal field theories. In: Physical Review B, 44 (6). pp. 2645-51.

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Abstract

We present a series of one-dimensional quantum Hamiltonians that, at certain critical points, realize the minimal series of conformal field theories with central charge less than one. The models consist of ferromagnetically coupled SU(2) spins in a transverse magnetic field. The infinite-spin (free-boson) limit is especially studied after performing the Holstein-Primakoff transformation. The analysis can be generalized to SU(3) quantum chains. These realize a different series of conformal field theories at criticality.

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	The American Physical Society
Additional Information:	Copyright of this article belongs to The American Physical Society.
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for Theoretical Studies (Ceased to exist at the end of 2003)
Date Deposited:	23 Jun 2007
Last Modified:	16 Jan 2012 05:20
URI:	http://eprints.iisc.ac.in/id/eprint/11233

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