Efficient Thermodynamic Description of Multi-Component One-Dimensional Bose Gases

Details Efficient Thermodynamic Description of Multi-Component One-Dimensional Bose Gases Efficient Thermodynamic Description of Multi-Component One-Dimensional Bose Gases

2011-03-31

arxiv.org/abs/1103.6152v2

Phys. Rev. A 84, 051604(R) (2011)

Physics

Condensed Matter

Statistical Mechanics

4.3 pages, RevTeX 4.1

Scientific paper

We present a new method of obtaining nonlinear integral equations characterizing the thermodynamics of one-dimensional multi-component gases interacting via a delta-function potential. In the case of the repulsive two-component Bose gas we obtain a simple system of two NLIE allowing for an efficient numerical implementation in contrast with the infinite number of coupled equations obtained by employing the Thermodynamic Bethe Ansatz. Our technique makes use of the Quantum Transfer Matrix and the fact that in a certain continuum limit multi-component gases can be obtained from appropriate anisotropic spin chains.

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