Adiabatic transition from a BCS superconductor to a Fermi liquid and phase dynamics
arXiv:2107.11638 · doi:10.1103/PhysRevB.105.184513
Abstract
We investigate the physics of an adiabatic transition from a BCS superconductor to a Fermi liquid for an exponentially slow decreasing pairing interaction. In particular, we show that the metal keeps memory of the parent BCS state so it is possible to reverse the dynamics and go back to the original state similarly to a spin/photon echo experiment. Moreover, we study the evolution of the order parameter phase phi in transforming the BCS superconductor to a conventional metal. Since the global phase is the conjugate variable of the density we explicitly show how to use the dynamics of phi together with gauge invariance to build up the non-interacting chemical potential away from particle-hole symmetry. We further analyze the role of phi in restoring the gauge invariant current response when the non-interacting Fermi liquid is approached starting from a BCS superconductor in the presence of an external vector field.
13 pages, 12 figures
References in corpus (10)
- Many-Body Physics with Ultracold Gases
- Theory of ultracold Fermi gases
- Universal adiabatic dynamics across a quantum critical point
- Synchronization in the BCS Pairing Dynamics as a Critical Phenomenon
- Dynamical vanishing of the order parameter in a fermionic condensate
- Emergent parametric resonances and time-crystal phases in driven BCS systems
- From sudden quench to adiabatic dynamics in the attractive Hubbard model
- Fate of dynamical phases of a BCS superconductor beyond the dissipationless regimen
- Spectral fingerprints of the non-linear dynamics of driven superconductors with dissipation
- Charge and pairing dynamics in the attractive Hubbard model: mode coupling and the validity of linear-response theory