论文标题
腔诱导多体定位
Cavity induced many-body localization
论文作者
论文摘要
在此手稿中，我们探讨了在强耦合时在空腔量子电动力学的背景下实现多体定位的可行性。使用与单模腔耦合的无旋转电子哈伯德链，我们表明电子和光子之间的全局耦合（通常可以预期它们会定位）偏爱定位的外观。这是由一种新型的高频扩展支持的支持，该扩展正确地说明了强耦合时电子 - 光子相互作用，以及单个粒子和多个体制方案的数值计算。我们发现证据表明，多体定位可以通过探索能量依赖性，看到定位的签名到光子数量的较小至$ n \ sim2 $，从而在光子数量的强烈量子波动中幸存下来。
In this manuscript, we explore the feasibility of achieving many-body localization in the context of cavity quantum electrodynamics at strong coupling. Working with a spinless electronic Hubbard chain sitting coupled to a single-mode cavity, we show that the global coupling between electrons and photons -- which generally would be expected to delocalize the fermionic excitations -- can instead favor the appearance of localization. This is supported by a novel high-frequency expansion that correctly accounts for electron-photon interaction at strong coupling, as well as numerical calculations in both single particle and many-bod regimes. We find evidence that many-body localization may survive strong quantum fluctuations of the photon number by exploring energy dependence, seeing signatures of localization down to photon numbers as small as $n\sim2$.
