控制惯性和耗散nematic liquid crystals中的自发发射：临界现象的作用
Controlling spontaneous emission in inertial and dissipative nematic liquid crystals: the role of critical phenomena
摘要：
我们开发了一个严格的，场论的方法来研究的自发发射在惯性和耗散液晶液晶，揭示了另一种应用程序的大规模Stueckelberg规范理论来描述这些系统中的临界现象。这种方法不仅可以揭示相变在液晶中自发发射中的作用，而且可以对超材料领域当前科学和技术感兴趣的现实向列相中的量子发射进行定量预测。具体来说，我们预测，可以开关和关闭量子发射在液晶中通过改变温度的附近的晶体到晶体的相变，为惯性和耗散的情况下。我们还预测从第一性原理的临界指数的值，表征这样的过渡，我们表明，不仅是独立的惯性或耗散动力学，但也是在良好的协议与实验。我们确定了发射器的偶极矩相对于抑制自发发射的定向器的取向，为实现所发射的辐射的方向性铺平了道路，该结果可以应用于可调谐光子器件，例如超表面和可调谐光源。
英文摘要：
We develop a rigorous, field-theoretical approach to the study of spontaneous emission in inertial and dissipative nematic liquid crystals, disclosing an alternative application of the massive Stueckelberg gauge theory to describe critical phenomena in these systems. This approach allows one not only to unveil the role of phase transitions in the spontaneous emission in liquid crystals but also to make quantitative predictions for quantum emission in realistic nematics of current scientific and technological interest in the field of metamaterials. Specifically, we predict that one can switch on and off quantum emission in liquid crystals by varying the temperature in the vicinities of the crystalline-to-nematic phase transition, for both the inertial and dissipative cases. We also predict from first principles the value of the critical exponent that characterizes such a transition, which we show not only to be independent of the inertial or dissipative dynamics, but also to be in good agreement with experiments. We determine the orientation of the dipole moment of the emitter relative to the nematic director that inhibits spontaneous emission, paving the way to achieve directionality of the emitted radiation, a result that could be applied in tuneable photonic devices such as metasurfaces and tuneable light sources.
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