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29 March 2024
 
  » arxiv » cond-mat/0606050

 Article overview


Finite temperature Drude weight of an integrable Bose chain
Michael Bortz ;
Date 2 Jun 2006
Subject Statistical Mechanics
AbstractWe study the Drude weight $D(T)$ at finite temperatures $T$ of an integrable bosonic model where the particles interact via nearest-neighbour coupling on a chain. At low temperatures, $D(T)$ is shown to be universal in the sense that this region is equivalently described by a Gaussian model. This low-temperature limit is also relevant for the integrable one-dimensional Bose gas. We then use the thermodynamic Bethe ansatz to confirm the low-temperature result, to obtain the high temperature limit of $D(T)$ and to calculate $D(T)$ numerically.
Source arXiv, cond-mat/0606050
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