Dynamical phases transitions in periodically driven Bardeen-Cooper-Schrieffer systems
Abstract
We present a systematic study of the dynamical phase diagram of a periodically driven BCS system as a function of drive strength and frequency. Three different driving mechanism are considered and compared: oscillating density of states, oscillating pairing interaction and oscillating external paring field. We identify the locus in parameter space of parametric resonances and four dynamical phases: Rabi-Higgs, gapless, synchronized Higgs and time-crystal. We demonstrate that the main features of the phase diagram are quite robust to different driving protocols and discuss the order of the transitions. By mapping the BCS problem to a collection of nonlinear and interacting classical oscillators, we shed light on the origin of time-crsytalline phases and parametric resonances appearing for subgap excitations.
Keywords
Cite
@article{arxiv.2210.15693,
title = {Dynamical phases transitions in periodically driven Bardeen-Cooper-Schrieffer systems},
author = {H. P. Ojeda Collado and Gonzalo Usaj and C. A. Balseiro and Damián H. Zanette and José Lorenzana},
journal= {arXiv preprint arXiv:2210.15693},
year = {2023}
}
Comments
15 pages, including 12 figures, appendix and references