Low-temperature transport in Heisenberg chains

Preprint

17 January 2002

preprint
Published by arXiv in arXiv

Abstract

A technique to determine accurately transport properties of integrable and non-integrable quantum-spin chains at finite temperatures by Quantum Monte-Carlo is presented. The reduction of the Drude weight by interactions in the integrable gapless regime is evaluated. Evidence for the absence of a Drude weight in the gapless regime of a non-integrable system with longer-ranged interactions is presented. We estimate the effect of the non-integrability on the transport properties and compare with recent experiments on one-dimensional quantum-spin chains.

Keywords

TEMPERATURE TRANSPORT
INTEGRABLE SYSTEM
HEISENBERG CHAINS
QUANTUM SPIN
DRUDE WEIGHT
SPIN CHAINS
MONTE CARLO
GAPLESS

All Related Versions

Version 1, 2001-05-30, ArXiv
Version 2, 2002-01-17, ArXiv
Version 3, 2002-01-18, ArXiv
Published version: Physical Review Letters, 88 (7), 077203.

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