论文标题
由Stark多体定位启用的离散时间晶体
Discrete time crystal enabled by Stark many-body localization
论文作者
论文摘要
离散时间晶体（DTC）最近引起了人们的关注，但是大多数DTC模型及其性质仅在平均疾病平均值后才揭示。在这封信中，我们提出了一个简单的无序定期驱动的模型，该模型表现出非平凡的DTC顺序，该模型通过Stark多体定位（MBL）稳定下来。我们通过从扰动理论中的分析分析以及可观察到的数值证据来证明DTC阶段的存在。新的DTC模型为进一步实验铺平了一种新的有希望的方法，并加深了我们对DTC的理解。由于DTC订单不需要特殊的量子状态准备和强障碍的平均水平，因此可以自然地在嘈杂的中间尺度量子（NISQ）硬件上实现，资源和重复较少。此外，除了强大的亚谐波响应外，在Stark-MBL DTC相中还有其他新颖的稳健跳动振荡，这些振荡在随机或准周期的MBL DTC中不存在。
Discrete time crystal (DTC) has recently attracted increasing attention, but most DTC models and their properties are only revealed after disorder average. In this Letter, we propose a simple disorder-free periodically driven model that exhibits nontrivial DTC order stabilized by Stark many-body localization (MBL). We demonstrate the existence of DTC phase by analytical analysis from perturbation theory and convincing numerical evidence from observable dynamics. The new DTC model paves a new promising way for further experiments and deepens our understanding of DTC. Since the DTC order doesn't require special quantum state preparation and the strong disorder average, it can be naturally realized on the noisy intermediate-scale quantum (NISQ) hardware with much fewer resources and repetitions. Moreover, besides the robust subharmonic response, there are other novel robust beating oscillations in Stark-MBL DTC phase which are absent in random or quasi-periodic MBL DTC.
