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Low-temperature transport in Heisenberg chains

J. V. Alvarez·Claudius Gros
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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.

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J. V. Alvarez, Claudius Gros. 2002-01-18. Low-temperature transport in Heisenberg chains. https://doi.org/10.1103/physrevlett.88.077203

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