论文标题
红色原子腔系统中的自组织极限周期
Self-organized Limit Cycles in Red-detuned Atom-cavity Systems
论文作者
论文摘要
冷原子腔QED领域的最新实验进步为探索非平衡相关的量子现象提供了强大的工具，而不是传统的凝结 - 一种情况。我们介绍了驱动的玻色污水凝结物的动力学相图，并与腔的光场结合，并带有横向驱动场从原子共振中进行了红色。我们确定参数空间中的区域，以极限周期的形式显示动态不稳定性，这些区域在强驾驶极限中演变成混乱的行为。这种极限循环源自空腔耗散和原子诱导的共振频移之间的相互作用，这修改了空腔模式的相位，并对原子密度调节产生过多的负面反馈，从而导致超级散射的不稳定性。我们发现与$ z_2 $对称性相关的极限周期的有趣合并，并确定纯原子激发形成的新型限制周期。还研究了量子波动和原子相互作用的影响。
Recent experimental advances in the field of cold-atom cavity QED provide a powerful tool for exploring non-equilibrium correlated quantum phenomena beyond conventional condensed-matter scenarios. We present the dynamical phase diagram of a driven Bose-Einstein condensate coupled with the light field of a cavity, with a transverse driving field red-detuned from atomic resonance. We identify regions in parameter space showing dynamical instabilities in the form of limit cycles, which evolve into chaotic behavior in the strong driving limit. Such limit cycles originate from the interplay between cavity dissipation and atom-induced resonance frequency shift, which modifies the phase of cavity mode and gives excessive negative feedback on the atomic density modulation, leading to instabilities of the superradiant scattering. We find interesting merging of the limit cycles related by a $Z_2$ symmetry, and identify a new type of limit cycle formed by purely atomic excitations. The effects of quantum fluctuations and atomic interactions are also investigated.
