| Issue |
EPL
Volume 140, Number 5, December 2022
|
|
|---|---|---|
| Article Number | 50001 | |
| Number of page(s) | 7 | |
| Section | General physics | |
| DOI | https://doi.org/10.1209/0295-5075/aca4f0 | |
| Published online | 02 December 2022 | |
Superfluidity vs. prethermalisation in a nonlinear Floquet system
1 Department of Physics, National University of Singapore - Singapore 117542, Singapore
2 Centre for Quantum Technologies, National University of Singapore - Singapore 117543, Singapore
3 Laboratoire de Physique Théorique, IRSAMC, Université de Toulouse, CNRS, UPS - Toulouse, France
4 MajuLab, International Joint Research Unit UMI 3654, CNRS, Université Côte d'Azur, Sorbonne Université, National University of Singapore, Nanyang Technological University - Singapore, Singapore
5 Université Côte d'Azur, CNRS, INPHYNI - Nice, France
(a) E-mail: mathias.albert@inln.cnrs.fr (corresponding author)
Received: 26 July 2022
Accepted: 22 November 2022
We show that superfluidity can be used to prevent thermalisation in a nonlinear Floquet system. Generically, periodic driving boils an interacting system to a featureless infinite temperature state. Fast driving is a known strategy to postpone Floquet heating with a large but always finite boiling time. In contrast, using a nonlinear periodically driven system on a lattice, we show the existence of a continuous class of initial states which do not thermalise at all. This absence of thermalisation is associated to the existence and persistence of a stable superflow motion.
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