The Universal Time-Dependent Ginzburg-Landau theory

Abstract

We study the hydrodynamics of superconductors within the framework of Schwinger-Keldysh Effective Field Theory. We show that in the vicinity of the superconducting phase transition the most general leading-order EFT satisfying the local Kubo-Martin-Schwinger condition is described by a version of the Time-Dependent Ginzburg-Landau (TDGL) equations augmented with stochastic terms. This version of TDGL is applicable in the gapless regime independently of any microscopic details. Within this approach, it is possible to include systematically the effects of non-uniform temperature and heat conductivity, as well as explicit or spontaneous breaking of time reversal. We also introduce a thermal version of the Josephson relation and use it to construct an exotic hydrodynamics describing a phase of matter where heat can flow without dissipation.

arXiv commentv2: 35 pages, version published in Physical Review B

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• Fracton superfluid hydrodynamics
• Nearly Critical Superfluids in Keldysh-Schwinger Formalism
• Field theory for the dynamics of the open $O(N)$ model
• Vortex-driven superconducting diode effect in asymmetric multilayer heterostructures