基于TMDC条纹的极子和激子半经典时间晶体在外部周期电位中的周期电位
Gabriel P Martins1,2,3, Oleg L Berman4,5, Godfrey Gumbs2,3,6
1Physics Department, New York City College of Technology, The City University of New York, 300 Jay Street, Brooklyn, NY, 11201, USA.
Scientific reports
|November 11, 2023
概括
我们发现纳米带中的激子-极子和激子系统可以作为半古典时间晶体 (TC). 这种行为甚至在量子校正下也持续存在,显示振荡密度配置文件.
科学领域:
- 量子物理学的量子物理学
- 凝聚物质物理学 凝聚物质物理学
- 材料科学是一种材料科学.
背景情况:
- 波斯-爱因斯坦凝聚物 (Bose-Einstein condensate,简称BEC) 是物质的量子状态.
- 时间晶体 (TCs) 是物质的状态,在时间上具有周期性行为.
- 过渡金属二甲基化物 (TMDCs) 中的刺激极子和刺激子对新的量子现象具有前景.
研究的目的:
- 在周期潜力下研究BEC的动态.
- 探索在TMDC纳米带中创建半经典时间晶体 (TC) 的潜力.
- 在量子校正下检查TC阶段的稳定性.
主要方法:
- 解决量子林布拉德密度矩阵的主方程在平均场近似内.
- 分析BEC空间密度配置文件以查找时间振荡相关性.
- 结合随机术语来模拟超出平均场理论的量子校正.
主要成果:
- 证明TMDC纳米带中的激子-极子和激子BEC表现出半经典的时间晶体行为.
- 在BEC空间密度配置文件中识别了振荡的,远程的两点相关系数,作为TC的证据.
- 证实了TC阶段的持久性,即使包括量子校正.
结论:
- 具有周期潜力的TMDC纳米带可以容纳稳定的半经典时间晶体.
- 该研究为在可控制的固态系统中实现TC提供了一条途径.
- 量子校正不会破坏观察到的时间晶体秩序.
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