Probing Klein tunneling through quantum quenches

量子相变的量子储层探测

Quantum reservoir probing of quantum phase transitions

本文提出利用量子储层探测（QRP）提取局部量子淬火效应，依据临界点附近量子涨落对其的抑制精确识别相界，并在可积、不可积及拓扑自旋系统中验证。

用Unruh-DeWitt探测器探测Klein-Gordon场的非平衡稳态

Probing non-equilibrium steady states of the Klein-Gordon field with Unruh-DeWitt detectors

本文计算Unruh-DeWitt探测器在非平衡稳态中的跃迁率，发现单极子不与热流耦合，探测器仅感知运动学效应，无法探测NESS的动力学特征。

通过双体 Bell 关联子探测非平衡物理

Probing non-equilibrium physics through the two-body Bell correlator

本文提出双体 Bell 算符可作为长程 XY 自旋链中动力学量子相变的有效见证，在临界边界处表现出显著下降，且能区分相内与相间淬火，优于传统关联子。

通过量子速度极限探测量子相变

Probing quantum phase transition via quantum speed limit

本文利用量子速度极限探测一维准周期系统中的退局域化-局域化相变，证明MT界限在短时和极端淬火下更紧，并能以更低计算成本精确识别相变点。

Complexity as a novel probe of quantum quenches: universal scalings and purifications

We apply the recently developed notion of complexity for field theory to a quantum quench through a critical point in 1+1 dimensions. We begin with a toy model consisting of a quantum harmonic oscillator, and show that complexity exhibits universal scalings in both the slow and fast quench regimes. We then generalize our results to a 1-dimensional harmonic chain, and show that preservation of these scaling behaviours in free field theory depends on the choice of norm. Applying our set-up to the case of two oscillators, we quantify the complexity of purification associated to a subregion, and d…

Probing the anomalous dynamical phase in long-range quantum spin chains through Fisher-zero lines

Using the framework of infinite Matrix Product States, the existence of an \textit{anomalous} dynamical phase for the transverse-field Ising chain with sufficiently long-range interactions was first reported in [J.~C.~Halimeh and V.~Zauner-Stauber, arXiv:1610:02019], where it was shown that \textit{anomalous} cusps arise in the Loschmidt-echo return rate for sufficiently small quenches within the ferromagnetic phase. In this work we further probe the nature of the anomalous phase through calculating the corresponding Fisher-zero lines in the complex time plane. We find that these Fisher-zero l…