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Phases of driven two-level systems with nonlocal dissipation

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Parmee, CD 
Cooper, NR 

Abstract

We study an array of two-level systems arranged on a lattice and illuminated by an external plane wave which drives a dipolar transition between the two energy levels. In this set up, the two-level systems are coupled by dipolar interactions and subject to nonlocal dissipation, so behave as an open many-body quantum system. We investigate the long-time dynamics of the system at the mean-field level, and use this to determine a phase diagram as a function of external drive and detuning. We find a multitude of phases including antiferromagnetism, spin density waves, oscillations and phase bistabilities. We investigate these phases in more detail and explain how nonlocal dissipation plays a role in the long-time dynamics. Furthermore, we discuss what features would survive in the full quantum description.

Description

Keywords

cond-mat.quant-gas, cond-mat.quant-gas

Journal Title

Physical Review A

Conference Name

Journal ISSN

2469-9926
2469-9934

Volume Title

97

Publisher

American Physical Society (APS)
Sponsorship
EPSRC (1642468)
Engineering and Physical Sciences Research Council (EP/K030094/1)
Engineering and Physical Sciences Research Council (EP/P009565/1)