论文标题
悬浮的纳米颗粒中的经典和量子时间晶体无驱动
Classical and quantum time crystals in a levitated nanoparticle without drive
论文作者
论文摘要
时间晶体被定义为物质自发表现出周期性的阶段。先前的研究集中在周期性驱动下的离散量子时间晶体上。在这里，我们提出了一个基于静态磁场中悬浮的带电纳米颗粒的时间晶体模型，而无需驱动。热平衡中的经典时间晶体和基态的量子时间晶体都可以在旋转旋转模式下，在强磁场或大电荷与质量比极限下出现。此外，首次定义了\ emph {time polycrystal}，并且自然出现在此模型中。我们的模型铺平了一种实现热平衡中时间晶体的方法。
Time crystal is defined as a phase of matter spontaneously exhibiting a periodicity in time. Previous studies focused on discrete quantum time crystals under periodic drive. Here, we propose a time crystal model based on a levitated charged nanoparticle in a static magnetic field without drive. Both the classical time crystal in thermal equilibrium and the quantum time crystal in the ground state can emerge in the spin rotational mode, under the strong magnetic field or the large charge-to-mass ratio limit. Besides, for the first time, the \emph{time polycrystal} is defined and naturally appears in this model. Our model paves a way for realizing time crystals in thermal equilibrium.
