论文标题

通过固态量子模拟器中的超阶相关性检测动态量子相变

Detecting dynamical quantum phase transition via out-of-time-order correlations in a solid-state quantum simulator

论文作者

Chen, Bing, Hou, Xianfei, Zhou, Feifei, Qian, Peng, Shen, Heng, Xu, Nanyang

论文摘要

使用量子统计力学的框架可以有效地表征许多平衡的身体系统。但是,量子的非平衡行为许多人体系统仍然难以捉摸,这是一个如此良好的框架的范围。量子模拟器中的实验现在正在为超出该均衡范式以外的量子状态的产生打开途径。作为封闭量子许多身体系统的示例,动态量子相变的行为是及时的相变,物理量在关键时期内成为未分析,将重要原理(例如普遍性)扩展到非平衡领域。在这里,在固态量子模拟器中,我们开发并在实验上证明,量化量子信息量化和量子混乱的中心概念可用于动态检测横向场ISING模型中的非平衡相变。我们还研究了多个量子光谱,最终观察到量子相关的堆积。该方案的进一步应用可以使其他外来现象(例如许多人体定位)的其他研究,以及量子和重力系统之间全息二元性的测试。

Quantum many body system in equilibrium can be effectively characterized using the framework of quantum statistical mechanics. However, nonequilibrium behaviour of quantum many body systems remains elusive, out of the range of such a well established framework. Experiments in quantum simulators are now opening up a route towards the generation of quantum states beyond this equilibrium paradigm. As an example in closed quantum many body systems, dynamical quantum phase transitions behave as phase transitions in time with physical quantities becoming nonanalytic at critical times, extending important principles such as universality to the nonequilibrium realm. Here, in solid state quantum simulator we develop and experimentally demonstrate that out-of-time-order correlators, a central concept to quantify quantum information scrambling and quantum chaos, can be used to dynamically detect nonoequilibrium phase transitions in the transverse field Ising model. We also study the multiple quantum spectra, eventually observe the buildup of quantum correlation. Further applications of this protocol could enable studies other of exotic phenomena such as many body localization, and tests of the holographic duality between quantum and gravitational systems.

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