Is Nonequilibrium Superconductivity a Quantum or a Classical Phenomenon?

Explore the intricacies of nonequilibrium superconductivity in this 31-minute lecture by Emil Yuzbashyan from the PCS Institute for Basic Science. Delve into the comparison between quantum and classical descriptions of nonequilibrium superconductivity, examining their validity in the thermodynamic limit. Learn how the classical mean-field approach accurately describes local observables but falls short for global quantities like entanglement entropy and Loschmidt echo. Discover the solution to exact quantum and classical long-time dynamics of a BCS superconductor with time-dependent interaction strength. Gain insights into the long-time steady state of the system, characterized as a gapless superconductor with unique superfluid properties. Understand the nonthermal nature of this state and its conformity to an emergent generalized Gibbs ensemble.