论文标题
准时间晶体
Quasi time crystal
论文作者
论文摘要
我们讨论制作准时间晶体的可能性。研究了一个简单的两态模型，以阐明我们的定义。在基态和激发态的叠加中，观察的概率在激发态的寿命中会定期变化。还围绕一阶量子相变讨论了准时间晶体，其特征是无限 - 体积极限中两个最低能量状态的变性和穿越。我们的结果具有广泛的有效性。例如，具有表面场的一维横向场ISing模型显示出具有相似的行为。振荡的磁化曲线被精确求解。
We discuss the possibility of making a quasi time crystal. A simple two-state model is studied to clarify our definition. In a superposition of the ground state and the excited state and the probability of observation varies periodically in time during the lifetime of the excited state. The quasi time crystal is also discussed around the first order quantum phase transition, which is characterized by the degeneracy and crossing of the two lowest-energy states in the infinite-volume limit. Our results have broad validity. As an example, the one-dimensional transverse field Ising model with surface fields is shown to have similar behavior. The oscillating magnetization profile is solved exactly.
