arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.06242cond-mat.stat-mechhep-thnlin.SI
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可积自旋链中流算子的代数构造

Algebraic construction of current operators in integrable spin chains

Balázs Pozsgay

摘要:

广义流体力学是近年来发展起来的一种描述一维可积模型大尺度输运性质的理论。这个理论的核心是一个精确的量子-经典对应,它指出即使在相互作用的量子多体模型中,守恒量的流动本质上也是准经典的。我们提供的代数背景,这一观察,通过嵌入当前运营商的可积自旋链到规范框架的杨巴克斯特可积性。我们的结构可以应用于各种各样的模型,包括XXZ自旋链,哈伯德模型,甚至在缺乏粒子守恒的模型,如XYZ链。关于XXZ链,我们提出了一个简化的证明,最近的精确结果,目前的平均值,并解释他们的准经典性质出现的精确计算。

英文摘要:

Generalized Hydrodynamics is a recent theory that describes the large scale transport properties of one dimensional integrable models. At the heart of this theory lies an exact quantum-classical correspondence, which states that the flows of the conserved quantities are essentially quasi-classical even in the interacting quantum many body models. We provide the algebraic background to this observation, by embedding the current operators of the integrable spin chains into the canonical framework of Yang-Baxter integrability. Our construction can be applied in a large variety of models including the XXZ spin chains, the Hubbard model, and even in models lacking particle conservation such as the XYZ chain. Regarding the XXZ chain we present a simplified proof of the recent exact results for the current mean values, and explain how their quasi-classical nature emerges from the exact computations.

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。

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