反常关联诱导的动力学相变
Anomalous correlation-induced dynamical phase transitions
AI总结：
本文提出了一种由低维无序系统中无序势内部空间关联突变驱动的新型动力学相变范式，揭示了由无限无序关联触发的反常量子动力学相变，并展示了关联Anderson模型中的退局域化相变特征。
摘要：
在量子淬火系统中，Loschmidt回波在临界时刻的非解析性被称为动力学量子相变，它将量子临界性的概念扩展到了非平衡场景。在本文中，我们建立了一种新的动力学相变范式，该相变由低维无序系统中无序势内部空间关联的突变所驱动。淬火前纯态系统与淬火后随机系统哈密顿量之间的淬火动力学揭示了一种由调制势中无限无序关联触发的反常量子动力学相变。这种反常现象的物理起源与两个截然不同的扩展态之间的重叠有关。此外，我们还探索了淬火前随机系统与淬火后纯态系统哈密顿量之间的淬火动力学。有趣的是，在热力学极限下，对于淬火前的白噪声势，淬火系统经历了动力学量子相变。此外，淬火动力学还展示了关联Anderson模型中退局域化相变的清晰特征。
英文摘要：
The nonanalyticity of the Loschmidt echo at critical times in quantum quenched systems is termed as the dynamical quantum phase transition, extending the notion of quantum criticality to a nonequilibrium scenario. In this paper, we establish a new paradigm of dynamical phase transitions driven by a sudden change in the internal spatial correlations of the disorder potential in a low-dimensional disordered system. The quench dynamics between prequenched pure and postquenched random system Hamiltonian reveals an anomalous quantum dynamical quantum phase transition triggered by an infinite disorder correlation in the modulation potential. The physical origin of the anomalous phenomenon is associated with the overlap between the two distinctly different extended states. Furthermore, we explore the quench dynamics between the prequenched random and postquenched pure system Hamiltonian. Interestingly, the quenched system undergoes dynamical quantum phase transitions for the prequench white-noise potential in the thermodynamic limit. In addition, the quench dynamics also shows a clear signature of the delocalization phase transition in the correlated Anderson model.
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