论文标题
用kibble-zurek淬火定位量子关键点
Locating quantum critical points with Kibble-Zurek quenches
论文作者
论文摘要
我们描述了一种基于对有限速率淬灭过程中非平衡敏感性的研究来找到量子临界点的方案，从而将系统从一个阶段转到另一个阶段。我们假设两个这样的淬灭是在相反的方向上进行的，并认为它们会导致在临界点的相对两侧形成非平衡敏感性的峰。然后将其位置缩小到驱动跃迁的参数的这些值所标记的间隔，并观察到峰。在两个确切可解决的模型中得出并验证了这种估计精确度的通用缩放时间。这些结果的实验相关性。
We describe a scheme for finding quantum critical points based on studies of a non-equilibrium susceptibility during finite-rate quenches taking the system from one phase to another. We assume that two such quenches are performed in opposite directions, and argue that they lead to formation of peaks of a non-equilibrium susceptibility on opposite sides of a critical point. Its position is then narrowed to the interval marked off by these values of the parameter driving the transition, at which the peaks are observed. Universal scaling with the quench time of precision of such an estimation is derived and verified in two exactly solvable models. Experimental relevance of these results is expected.
