在光学腔中调节简并费米气体的密度和自旋排序
Tuning Density and Spin Ordering of Degenerate Fermi Gases in an Optical Cavity
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中文总结 AI 辅助
研究与光学腔耦合的自旋简并费米气体，通过控制泵浦和腔场相对偏振角，利用标量 - 矢量耦合权重和泡利阻塞协同决定相变阈值，明确相对偏振角对相变影响，为实验实现提供理论见解。
中文摘要 AI 辅助
我们研究了与高精细度光学腔耦合的自旋简并费米气体，其中标量和矢量耦合之间的竞争由泵浦场和腔场的相对偏振角控制。我们发现相变阈值由标量 - 矢量耦合权重和泡利阻塞协同决定，后者决定了超辐射开始所需的临界泵浦晶格深度。对于具有相反自旋的两组分费米气体，布居比驱动对应于实空间相分离的两种不同类型的相变：连续和不连续的。然而，相变边界仍然从根本上由标量 - 矢量耦合竞争决定。我们阐明了相对偏振角对系统相变的影响；这些结果也适用于玻色子系统。我们的结果为未来的实验实现提供了有价值的理论见解。
英文摘要
We investigate a spin-degenerate Fermi gas coupled to a high-finesse optical cavity, where the competition between scalar and vectorial couplings is controlled by the relative polarization angle of the pump and cavity fields. We find that the phase transition threshold is synergistically determined by the scalar-vectorial coupling weight and Pauli blocking, with the latter dictating the critical pump lattice depth required for the onset of superradiance. For a two-component Fermi gas with opposite spins, the population ratio drives two distinct types of phase transitions corresponding to real-space phase separation: continuous and discontinuous. Nevertheless, the boundary of the phase transition remains fundamentally governed by the scalar-vectorial coupling competition. We clarify the impact of the relative polarization angle on phase transitions of the system; these results also apply to bosonic systems. Our results provide valuable theoretical insights for future experimental realizations.
