期刊
PHYSICAL REVIEW LETTERS
卷 119, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.119.010602
关键词
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资金
- Swiss National Science Foundation
- National Science Foundation (NSF)
- Center for Ultracold Atoms (CUA, NSF Physics Frontiers Center)
- Vannevar Bush Fellowship (Office of Naval Research)
- Army Research Office, Multi- University Research Initiative (ARO MURI)
- Gordon and Betty Moore Foundation
- NSF [NSF PHY11-25915]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1506284] Funding Source: National Science Foundation
We analyze the quantum dynamics of periodically driven, disordered systems in the presence of longrange interactions. Focusing on the stability of discrete time crystalline (DTC) order in such systems, we use a perturbative procedure to evaluate its lifetime. For 3D systems with dipolar interactions, we show that the corresponding decay is parametrically slow, implying that robust, long-lived DTC order can be obtained. We further predict a sharp crossover from the stable DTC regime into a regime where DTC order is lost, reminiscent of a phase transition. These results are in good agreement with the recent experiments utilizing a dense, dipolar spin ensemble in diamond [Nature (London) 543, 221 (2017)]. They demonstrate the existence of a novel, critical DTC regime that is stabilized not by many-body localization but rather by slow, critical dynamics. Our analysis shows that the DTC response can be used as a sensitive probe of nonequilibrium quantum matter.
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