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MP: Fachverband Theoretische und Mathematische Grundlagen der Physik

MP 7: Poster (joint session MP/QI)

MP 7.8: Poster

Tuesday, March 19, 2024, 11:00–13:00, Poster B

Slow Modes in Dissipatively Stabilized Superconductors — •Tom Zander and Sebastian Diehl — Universität zu Köln, D-50937 Cologne, Germany

Topological states of fermionic matter can be induced by purely dissipative dynamics. Other interesting states can exhibit superfluidity or superconductivity. The states which are cooled into, irregardless of the initial state, are called 'dark states'.

We construct an interacting field theory using the Keldysh formalism to investigate a system of 1d fermions cooling into a superconducting dark state. Using the Hubbard-Stratonovich transformation, as well as other tools of quantum field theory, we derive, in the long wavelength limit, the effective slow mode action for the Goldstone and hydrodynamic modes.

Keywords: Dissipative Dynamics; Dark State; Superfluidity; Superconductivity