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arXiv 1901.04438quant-ph
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非局域耗散下受驱动的Bose-Hubbard二聚体:一种双稳态时间晶体

Driven Bose-Hubbard dimer under nonlocal dissipation: A bistable time crystal

Cristóbal Lledó, Themistoklis Mavrogordatos, Marzena Szymańska

摘要:

研究了非局域耗散下开放相干驱动的玻色-哈伯德二聚体的临界行为。一个守恒量来自耗散的非局部性质,使二聚体多稳态。在弱耦合半经典极限下,临界性表现为振幅双稳和时空对称性破缺。形成了一个周期性的晶体,由约瑟夫森样振荡组成。平均场动力学和量子轨道补充了刘维的光谱分析方法的半经典极限。

英文摘要:

We investigate the critical behavior of the open coherently-driven Bose-Hubbard dimer under nonlocal dissipation. A conserved quantity arises from the nonlocal nature of the dissipation, rendering the dimer multistable. In the weak-coupling semiclassical limit, the displayed criticality takes the form of amplitude bistability and breaking of spatial and temporal symmetries. A period-bistable time crystal is formed, consisting of Josephson-like oscillations. Mean-field dynamics and quantum trajectories complement the spectral analysis of the Liouvillian in the approach to the semiclassical limit.

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