Lewis-Swan Robert J, Barberena Diego, Cline Julia R K, Young Dylan J, Thompson James K, Rey Ana Maria
Homer L. Dodge Department of Physics and Astronomy, The University of Oklahoma, Norman, Oklahoma 73019, USA.
Center for Quantum Research and Technology, The University of Oklahoma, Norman, Oklahoma 73019, USA.
Phys Rev Lett. 2021 Apr 30;126(17):173601. doi: 10.1103/PhysRevLett.126.173601.
We propose to simulate dynamical phases of a BCS superconductor using an ensemble of cold atoms trapped in an optical cavity. Effective Cooper pairs are encoded via the internal states of the atoms, and attractive interactions are realized via the exchange of virtual photons between atoms coupled to a common cavity mode. Control of the interaction strength combined with a tunable dispersion relation of the effective Cooper pairs allows exploration of the full dynamical phase diagram of the BCS model as a function of system parameters and the prepared initial state. Our proposal paves the way for the study of the nonequilibrium features of quantum magnetism and superconductivity by harnessing atom-light interactions in cold atomic gases.
我们提议使用捕获在光学腔中的冷原子系综来模拟BCS超导体的动力学相。有效的库珀对通过原子的内部状态进行编码，而吸引相互作用则通过耦合到共同腔模的原子之间虚拟光子的交换来实现。相互作用强度的控制与有效库珀对的可调色散关系相结合，使得能够探索作为系统参数和制备的初始状态函数的BCS模型的完整动力学相图。我们的提议为通过利用冷原子气体中的原子 - 光相互作用来研究量子磁性和超导性的非平衡特征铺平了道路。
