arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2008.00996cond-mat.stat-mechcond-mat.soft
收藏

量子多体系统中活性诱导的相变

Activity-induced phase transition in a quantum many-body system

Kyosuke Adachi, Kazuaki Takasan, Kyogo Kawaguchi

摘要:

一群非平衡实体可以表现出在常规平衡设置中被禁止的相变行为。一个有趣的问题是,类似的活性驱动的相变是否也发生在纯量子系统中。在这里,我们介绍了一个最小简单的量子多体模型,经历量子相变诱导的非厄米性。该模型是基于一个经典的各向异性格子气模型,经历运动诱导相分离(MIPS),和量子相图包括其他活动相,如植绒相。量子相变原理上可以在超冷原子实验中得到验证,但它也可以看作是经典动力学中在外加偏场作用下动力学路径的转变。这种方法揭示了经典非平衡动力学和非厄米量子物理之间的有用联系。

英文摘要:

A crowd of nonequilibrium entities can show phase transition behaviors that are prohibited in conventional equilibrium setups. An interesting question is whether similar activity-driven phase transitions also occur in pure quantum systems. Here we introduce a minimally simple quantum many-body model that undergoes quantum phase transitions induced by non-Hermiticity. The model is based on a classical anisotropic lattice gas model that undergoes motility-induced phase separation (MIPS), and the quantum phase diagram includes other active phases such as the flocking phase. The quantum phase transitions, which in principle can be tested in ultracold atom experiments, is also identified as the transitions of dynamical paths in the classical kinetics upon the application of biasing fields. This approach sheds light on the useful connection between classical nonequilibrium kinetics and non-Hermitian quantum physics.

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。

↑