论文标题
波动在量子和经典时间晶体中的作用
The role of fluctuations in quantum and classical time crystals
论文作者
论文摘要
离散的时间晶体（DTC）是一种多体状态，其动力学比作用在其上的力慢。对于具有倍增分叉的经典系统也是如此。因此，这个问题自然会出现与量子DTC的经典区别。在这里，我们分析了Bose-Hubbard模型的一种变体，该模型描述了众多物理现象，并具有经典的和量子的时间晶状体极限。我们研究了波动对系统稳定性的作用，并且在量子和经典DTC之间没有区别。这使我们能够在实验中使用两个强烈耦合的参数谐振器探测波动。
Discrete time crystals (DTCs) are a many-body state of matter whose dynamics are slower than the forces acting on it. The same is true for classical systems with period-doubling bifurcations. Hence, the question naturally arises what differentiates classical from quantum DTCs. Here, we analyze a variant of the Bose-Hubbard model, which describes a plethora of physical phenomena and has both a classical and a quantum time-crystalline limit. We study the role of fluctuations on the stability of the system and find no distinction between quantum and classical DTCs. This allows us to probe the fluctuations in an experiment using two strongly coupled parametric resonators subject to classical noise.
