日本冲绳科学技术大学Thomas Busch团队研究了拓扑非平凡量子多体系统中的猝灭动力学。该研究成果发表在2025年3月18日出版的《物理评论A》杂志上。

课题组研究了基态费米子多体气体的非平衡动力学，该气体在拓扑非平凡哈密顿量的参数区域之间受到淬灭。通过关注系统中固有的手性边缘态的作用，研究组计算了多体重叠，并表明正交突变的特征单调衰减随着系统规模的增加而显著改变。

具体而言，研究组证明了动力学不仅受总粒子数的控制，还受占据的单粒子边缘态的数量的控制。通过对全功概率分布的分析，进一步解释了这种行为，从而加深了对系统动态的理解。

附：英文原文

Title: Quench dynamics in topologically nontrivial quantum many-body systems

Author: Sarika Sasidharan Nair, Giedrius labys, Wen-Bin He, Thomás Fogarty, Thomas Busch

Issue&Volume: 2025/03/18

Abstract: We investigate the nonequilibrium dynamics of a ground-state fermionic many-body gas subjected to a quench between parameter regimes of a topologically nontrivial Hamiltonian. By focusing on the role of the chiral edge states inherent in the system, we calculate the many-body overlap and show that the characteristic monotonic decay of the orthogonality catastrophe with increasing system size is notably altered. Specifically, we demonstrate that the dynamics are governed not solely by the total particle number but, rather, by the number of occupied single-particle edge states. This behavior is further explained through an analysis of the full work probability distribution, providing a deeper understanding of the system's dynamics.

DOI: 10.1103/PhysRevA.111.033313

Source: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.111.033313