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Cavity-QED Quantum Simulator of Dynamical Phases of a Bardeen-Cooper-Schrieffer Superconductor

2021; American Physical Society; Volume: 126; Issue: 17 Linguagem: Inglês

10.1103/physrevlett.126.173601

1092-0145

Robert J. Lewis-Swan, Diego Barberena, Julia R. K. Cline, Dylan J. Young, James K. Thompson, Ana María Rey,

Quantum Information and Cryptography

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 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 non-equilibrium features of quantum magnetism and superconductivity by harnessing atom-light interactions in cold atomic gases.