Optical Pumping of Bardeen-Cooper-Schrieffer Superconductors
arXiv:2407.16350 · doi:10.1103/PhysRevB.110.184513
Abstract
Motivated by the generation by optical pulses of non-thermal distributions of nuclear spins in quantum dots we investigate the effect of optical pulses applied to Bardeen-Cooper-Schrieffer (BCS) superconductors. Using time-dependent mean-field theory formulated with Anderson pseudospins, we study the electronic configurations and the energy deposited in the system by optical pulses. The pulses are included by Peierls substitution and we study short rectangular pulses as well as idealized pulses. Already a few and even a single pulse generates highly non-trivial distributions of electron expectation values which we simulate numerically and explain analytically based on the linearization of the equations of motion. These results suggest so far unexplored experimental possibilities for the optical control of superconducting states.
14 pages, 19 figures
References in corpus (13)
- The Magnus expansion and some of its applications
- Amplitude / Higgs Modes in Condensed Matter Physics
- Synchronization in the BCS Pairing Dynamics as a Critical Phenomenon
- Robust manipulation of electron spin coherence in an ensemble of singly charged quantum dots
- Cooper pair turbulence in atomic Fermi gases
- Exact solution for quantum dynamics of a periodically-driven two-level-system
- Theory of nonequilibrium dynamics of multiband superconductors
- Non-equilibrium nuclear spin distribution function in quantum dots subject to periodic pulses
- High-order nonlinear terahertz probing of the two-band superconductor MgB: Third- and fifth-order harmonic generation
- Dynamical phases transitions in periodically driven Bardeen-Cooper-Schrieffer systems
- Nonlinear Response of Diffusive Superconductors to -electromagnetic Fields
- Spectral fingerprints of the non-linear dynamics of driven superconductors with dissipation
- Collective excitations in competing phases in two and three dimensions