期刊
NEW JOURNAL OF PHYSICS
卷 21, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/ab2afe
关键词
quantum many-body physics; dynamical phases of matter; driven dissipative systems
资金
- DARPA DRINQS program [D18AC00014, D18AC00033]
- NSF [PHY-1748958]
- AFOSR-MURI Photonic Quantum Matter [FA95501610323]
- Harvard-MIT CUA
- National Science Foundation (NSF)
- David and Lucille Packard Foundation
- W. M. Keck Foundation
- Vannevar Bush Faculty Fellowship
- European Union [745608]
- NSF
- Smithsonian Astrophysical Observatory
- Marie Curie Actions (MSCA) [745608] Funding Source: Marie Curie Actions (MSCA)
The Dicke model-a paradigmatic example of superradiance in quantum optics-describes an ensemble of atoms which are collectively coupled to a leaky cavity mode. As a result of the cooperative nature of these interactions, the system's dynamics is captured by the behavior of a single mean-field, collective spin. In this mean-field limit, it has recently been shown that the interplay between photon losses and periodic driving of light-matter coupling can lead to time-crystalline-like behavior of the collective spin (Gong et al 2018 Phys. Rev. Lett. 120 040404). In this work, we investigate whether such a Dicke time crystal (TC) is stable to perturbations that explicitly break the mean-field solvability of the conventional Dicke model. In particular, we consider the addition of short-range interactions between the atoms which breaks the collective coupling and leads to complex many-body dynamics. In this context, the interplay between periodic driving, dissipation and interactions yields a rich set of dynamical responses, including long-lived and metastable Dicke-TCs, where losses can cool down the many-body heating resulting from the continuous pump of energy from the periodic drive. Specifically, when the additional short-range interactions are ferromagnetic, we observe time crystalline behavior at non-perturbative values of the coupling strength, suggesting the possible existence of stable dynamical order in a driven-dissipative quantum many-body system. These findings illustrate the rich nature of novel dynamical responses with many-body character in quantum optics platforms.
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