论文标题
非平稳性和耗散时间晶体：光谱特性和有限尺寸效果
Non-stationarity and Dissipative Time Crystals: Spectral Properties and Finite-Size Effects
论文作者
论文摘要
我们讨论开放量子多体系统中非平稳性的出现。这使我们对耗散时间晶体的定义进行了定义，这些晶体表现出可观察到的可观察到的，持续的，时间周期性的振荡，这与环境嘈杂接触引起。我们使用Loschmidt Echo和局部可观察物来表明存在有限尺寸的耗散时间晶体。然后，从封闭的哈伯德模型开始，我们提供了耗散机制的示例，这些耗散机制在实验上可观察到的量子周期性动力学，并允许分析有限尺寸的耗散时间晶体的出现。对于包括两粒子损失和增益的无序哈伯德模型，我们在长期以来发现GHz状态之间的黑汉顿驾驶振荡。最后，我们讨论如何实验实现提出的例子。
We discuss the emergence of non-stationarity in open quantum many-body systems. This leads us to the definition of dissipative time crystals which display experimentally observable, persistent, time-periodic oscillations induced by noisy contact with an environment. We use the Loschmidt echo and local observables to indicate the presence of a finite sized dissipative time crystal. Starting from the closed Hubbard model we then provide examples of dissipation mechanisms that yield experimentally observable quantum periodic dynamics and allow analysis of the emergence of finite sized dissipative time crystals. For a disordered Hubbard model including two-particle loss and gain we find a dark Hamiltonian driving oscillations between GHZ states in the long-time limit. Finally, we discuss how the presented examples could be experimentally realized.
