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Critical quantum spin chains as conformal field theories

Sen, D (1992) Critical quantum spin chains as conformal field theories. In: Indian Journal of Physics, 66A (4). pp. 545-555.

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Abstract

The author presents a series of one-dimensional quantum Hamiltonians which, at their critical points, realise the minimal unitary series of conformal field theories with central charge less than 1. The models consist of ferromagnetically coupled SU(2) spins in a transverse magnetic field. He shows how the infinite spin (free boson) limit can be obtained by using the Holstein-Primakoff transformation. The analysis can be generalised to SU(3) quantum chains which realise a different series of conformal field theories at criticality .

Item Type: Journal Article
Department/Centre: Division of Physical & Mathematical Sciences > Centre for Theoretical Studies
Date Deposited: 07 Dec 2006
Last Modified: 27 Aug 2008 12:26
URI: http://eprints.iisc.ernet.in/id/eprint/8921

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