Low-temperature transport in Heisenberg chains

Details Low-temperature transport in Heisenberg chains Low-temperature transport in Heisenberg chains

2001-05-30

arxiv.org/abs/cond-mat/0105585v3

Phys. Rev. Lett. 88, 077203 (2002)

Physics

Condensed Matter

accepted for publication (PRL)

Scientific paper

10.1103/PhysRevLett.88.077203

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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