论文标题
量子淬灭下局部弦乐可观察物的延迟关键行为
Late-time critical behavior of local string-like observables under quantum quenches
论文作者
论文摘要
最近，已经观察到，平衡量子临界点的特征令人惊讶地显示在显然远离平衡的多体系统中。我们探讨了经受淬火的旋转系统的相互作用，并开发了一种可靠的方法，可以通过脉温后动力学进行系统地探测基态临界物理。分析有限弦乐可观测值的延迟时间行为，我们发现了出现的平衡临界性的尖锐特征。具体而言，这些可观察物准确地检测到淬火后长时间后长时间检测平衡临界点和通用缩放指数。尽管事实是分析系统非常混乱/颈，有趣的是，这是由于对这些可观察物在淬火后保留的初始条件的强烈记忆所致。我们发现，我们的结果也可以用来解释在Quench后结构域形成中的关键特征，这在最近的一个被捕获的离子量子模拟器的实验中可以看出。
In recent times it has been observed that signatures of equilibrium quantum criticality surprisingly show up in many-body systems which are manifestly far from equilibrium. We explore such scenarios in interacting spin systems subject to a quench and develop a robust method to systematically probe ground state critical physics through nonequilibrium post-quench dynamics. Analyzing late-time behavior of finite string-like observables, we find emerging sharp signatures of equilibrium criticality. Specifically, these observables accurately detect equilibrium critical points and universal scaling exponents after long times following a quench. This happens despite the fact that the analyzed systems are strongly chaotic/ergodic and is interestingly due to a strong memory of the initial conditions retained by these observables after quench. We find that our results can also be used to explain critical signatures in post-quench domain formation, seen in a recent experiment with trapped ion quantum simulators.
