Dynamics of a degenerate Fermi gas in a one-dimensional optical lattice coupled to a cavity
Dynamics of a degenerate Fermi gas in a one-dimensional optical lattice coupled to a cavity
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DOI：
10.1103/physreva.83.043606
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发表时间：
2011-04
影响因子：
2.9
通讯作者：
Qing Sun;Xing-hua Hu;A. Ji;Wuming Liu
中科院分区：
文献类型：
--
作者：
Qing Sun;Xing-hua Hu;A. Ji;Wuming Liu
我们系统地研究了耦合到单模腔场的光晶格势中一维简并费米气体的动力学。我们推导出一个有效的模型来研究空腔场引起的非微扰效应。我们的数值结果表明，由于光晶格势的加入，系统经历了二阶跃迁到双稳态密度波稳态，其中原子形成密度波并且腔场是双稳态的。此外，还可以观察到腔光子数的相干振荡行为。我们还提出了一个可行的实验协议来实现这些现象，这可能有利于未来的量子信息应用。
We systematically study the dynamics of a one-dimensional degenerate Fermi gas in an optical-lattice potential coupled to a single-mode cavity field. We derive an effective model to study the nonperturbative effect caused by the cavity field. Our numerical results show that due to the addition of the optical-lattice potential, the system undergoes second-order transition to a bistable density-wave steady state, where the atoms form a density wave and the cavity field is bistable. In addition, the coherent oscillating behavior of the cavity photon number can be observed. We also present a feasible experimental protocol to realize these phenomena, which may be beneficial for future quantum-information applications.