Condensation in hybrid superconducting-cavity-microscopic-spins systems with finite-bandwidth drive
Condensation in hybrid superconducting-cavity-microscopic-spins systems with finite-bandwidth drive
复制标题
有限带宽驱动混合超导腔微观自旋系统中的凝聚
DOI：
10.1103/physrevb.106.024502
复制
发表时间：
2022
影响因子：
3.7
通讯作者：
Au-Yeung R
中科院分区：
文献类型：
--
作者：
Au-Yeung R
利用Keldysh场理论，我们找到了在直接有限带宽非相干腔驱动下开放的Tavis-Cummings模型中非平衡凝聚的条件。在实验上，我们希望凝聚过渡可以很容易地耦合到微观自旋的混合超导系统，以及许多其他非相干驱动的光物质系统。在我们的理论分析中，我们明确地将驱动器的光谱分布纳入鞍点描述。我们发现，注入的非相干光子创建一个驱动器依赖的有效耦合自旋1/2粒子之间。凝结转变出现在一个临界状态的驱动，我们现在可以准确地预测。我们的研究结果也提供了重要的指导，为未来的量子模拟实验的非平衡相的混合装置。
Using Keldysh field theory, we find conditions for nonequilibrium condensation in the open Tavis-Cummings model under a direct finite-bandwidth incoherent cavity drive. Experimentally, we expect the condensation transition to be easily accessible to hybrid superconducting systems coupled to microscopic spins, as well as to many other incoherently driven light-matter systems. In our theoretical analysis, we explicitly incorporate the drive's spectral distribution into the saddle-point description. We show that the injected incoherent photons create a drive-dependent effective coupling between spin-1/2 particles. The condensation transition arises at a critical regime of driving which we can now accurately predict. Our results also provide important guidelines for future quantum simulation experiments of nonequilibrium phases with hybrid devices.