arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0909.0752quant-phcond-mat.str-el
收藏

量子猝灭后的拓扑序

Topological Order Following a Quantum Quench

D. I. Tsomokos, A. Hamma, W. Zhang, S. Haas, R. Fazio

摘要:

我们确定的条件下,拓扑秩序生存的快速量子淬火。具体地说,我们考虑的情况下,量子自旋系统是准备在基态的复曲面代码模型,淬火后,它的发展与不支持拓扑秩序的哈密顿量。我们提供的分析结果支持的各种淬火哈密顿的数值证据。通过研究拓扑熵和一种新的动力学测度,检验了拓扑序在非平衡情形下的鲁棒性.该测度利用了不同拓扑扇区的部分密度矩阵之间的相似性.

英文摘要:

We determine the conditions under which topological order survives a rapid quantum quench. Specifically, we consider the case where a quantum spin system is prepared in the ground state of the Toric Code Model and, after the quench, it evolves with a Hamiltonian that does not support topological order. We provide analytical results supported by numerical evidence for a variety of quench Hamiltonians. The robustness of topological order under non-equilibrium situations is tested by studying the topological entropy and a novel dynamical measure, which makes use of the similarity between partial density matrices obtained from different topological sectors.

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。

↑