Universality in the onset of quantum chaos in many-body systems
Universality in the onset of quantum chaos in many-body systems
复制标题
多体系统中量子混沌发生的普遍性
DOI:
10.1103/physrevb.104.l201117
复制
发表时间:
2021
影响因子:
3.7
通讯作者:
Rigol, Marcos
中科院分区:
文献类型:
--
作者:
LeBlond, Tyler;Sels, Dries;Polkovnikov, Anatoli;Rigol, Marcos
We show that the onset of quantum chaos at infinite temperature in two many-body one-dimensional lattice models, the perturbed spin-1/2 XXZ and Anderson models, is characterized by universal behavior. Specifically, we show that the onset of quantum chaos is marked by maxima of the typical fidelity susceptibilities that scale with the square of the inverse average level spacing, saturating their upper bound, and that the strength of the integrability- or localization-breaking perturbation at these maxima decreases with increasing system size. We also show that the spectral function below the “Thouless” energy (in the quantum-chaotic regime) diverges when approaching those maxima. Our results suggest that, in the thermodynamic limit, arbitrarily small integrability- or localization-breaking perturbations result in quantum chaos in the many-body quantum systems studied here.
登录
查看更多内容
影响因子:
8.6
作者:
Bertini, Bruno;Essler, Fabian H. L.;Robinson, Neil J.
通讯作者:
Robinson, Neil J.
影响因子:
12.5
作者:
Mallayya, Krishnanand;Rigol, Marcos;De Roeck, Wojciech
通讯作者:
De Roeck, Wojciech
影响因子:
3.7
作者:
Friedman, Aaron J.;Gopalakrishnan, Sarang;Vasseur, Romain
通讯作者:
Vasseur, Romain
影响因子:
8.6
作者:
Clos, Govinda;Porras, Diego;Schaetz, Tobias
通讯作者:
Schaetz, Tobias
影响因子:
2.9
作者:
Rigol, Marcos
通讯作者:
Rigol, Marcos