原子莫特绝缘体的光学性质：从慢光到动态卡西米尔效应
Optical properties of atomic Mott insulators: from slow light to dynamical Casimir effects
摘要：
本文从理论上研究了超冷相干修饰三能级原子气体在光晶格莫特绝缘体相中的光学性质。通过改变修整光束的振幅和频率，可以实时控制极化激元场的真空状态、能带色散和吸收谱。在弱修整区，该系统显示出独特的无吸收超慢光传播特性。在存在一个快速的时间调制的敷料振幅，我们预测一个显着的发射光子对的极化激元零点波动的参量放大。定量考虑这样一个动态的Casimir效应的实验可观测性提出了最有前途的原子种类和水平计划。
英文摘要：
We theoretically study the optical properties of a gas of ultracold, coherently dressed three-level atoms in a Mott insulator phase of an optical lattice. The vacuum state, the band dispersion and the absorption spectrum of the polariton field can be controlled in real time by varying the amplitude and the frequency of the dressing beam. In the weak dressing regime, the system shows unique ultra-slow light propagation properties without absorption. In the presence of a fast time modulation of the dressing amplitude, we predict a significant emission of photon pairs by parametric amplification of the polaritonic zero-point fluctuations. Quantitative considerations on the experimental observability of such a dynamical Casimir effect are presented for the most promising atomic species and level schemes.
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