A cavity-QED quantum simulator of dynamical phases of a BCS superconductor

TL;DR

This paper proposes a method to simulate the dynamical phases of a BCS superconductor using cold atoms in an optical cavity, enabling exploration of non-equilibrium quantum phenomena.

Contribution

It introduces a novel cavity-QED setup to emulate BCS superconductor dynamics with tunable interactions and initial states.

Findings

Potential to study non-equilibrium quantum phases

Simulation of full dynamical phase diagram

Control over interaction strength and dispersion relations

Abstract

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.