T − W relation and free energy of the Heisenberg chain at a finite temperature

被引：0

作者：

Pengcheng Lu

Yi Qiao

Junpeng Cao

Wen-Li Yang

Kang jie Shi

Yupeng Wang

机构：

[1] Northwest University,Institute of Modern Physics

[2] Chinese Academy of Sciences,Beijing National Laboratory for Condensed Matter Physics, Institute of Physics

[3] University of Chinese Academy of Sciences,School of Physical Sciences

[4] Songshan Lake Materials Laboratory,undefined

[5] Peng Huanwu Center for Fundamental Theory,undefined

[6] Shaanxi Key Laboratory for Theoretical Physics Frontiers,undefined

[7] The Yangtze River Delta Physics Research Center,undefined

来源：

Journal of High Energy Physics | / 2021卷

关键词：

Bethe Ansatz; Lattice Integrable Models;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A new nonlinear integral equation (NLIE) describing the thermodynamics of the Heisenberg spin chain is derived based on the t − W relation of the quantum transfer matrices. The free energy of the system in a magnetic field is thus obtained by solving the NLIE. This method can be generalized to other lattice quantum integrable models. Taking the SU(3)-invariant quantum spin chain as an example, we construct the corre- sponding NLIEs and compute the free energy. The present results coincide exactly with those obtained via other methods previously.

引用

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