arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1306.6040cond-mat.stat-mech
收藏

具有竞争相互作用的量子自旋链的热力学

Thermodynamics of quantum spin chains with competing interactions

T. S. Tavares, G. A. P. Ribeiro

摘要:

我们考虑具有竞争相互作用的可积量子自旋链。我们应用量子转移矩阵的方法,这些自旋链。这使我们能够推导出一组非线性积分方程的热力学这些自旋链。我们提供了这些积分方程的熵作为磁场,温度和耦合常数的函数的数值解。这使我们能够评估,在低,但有限的温度下,图片描述的基态图高自旋链和较长范围的链间相互作用。

英文摘要:

We consider integrable quantum spin chains with competing interactions. We apply the quantum transfer matrix approach to these spin chains. This allowed us to derive a set of non-linear integral equations for the thermodynamics of these spin chains. We provide numerical solution of these integral equations for the entropy as function of magnetic field, temperature and the coupling constant. This allow us to assess, at low but finite temperature, the picture describing the ground state diagram for high spin chain and longer range interchain interactions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑