期刊
NEW JOURNAL OF PHYSICS
卷 23, 期 10, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/1367-2630/ac29fe
关键词
quantum synchronization; metastability; quantum van der Pol oscillator; driven-dissipative phenomena; open quantum systems
资金
- Spanish State Research Agency, through the QUARESC Project [PID2019-109094GB-C21/AEI/10.13039/501100011033]
- Spanish State Research Agency, through the Severo Ochoa and Maria de Maeztu Program for Centers and Units of Excellence in RD [MDM-2017-0711]
- CAIB through the QUAREC project [PRD2018/47]
- CAIB PhD program
- Spanish Ministerio de Educacion y Formacion Profesional/Ministerio Universidades
- University of the Balearic Islands through the Beatriz Galindo program [BG20/00085]
Research shows that quantum van der Pol oscillators, driven by squeezed drive, display multiple preferred phases and exhibit extremely long lifetimes, which is related to metastability in open quantum systems.
Quantum van der Pol oscillators are driven-dissipative systems displaying quantum synchronization phenomena. When forced by a squeezed drive, the frequency adjusts to half of the forcing displaying multiple preferred phases. Here we analyze the physical origin of this entrained response, establishing a connection with metastability in open quantum systems. We report a dynamical regime characterized by a huge separation of time scales, in which a dynamical mode displays a lifetime that can be orders of magnitude larger than the rest. In this regime, the long-time dynamics is captured by an incoherent process between two metastable states, which correspond to the preferred phases of the synchronized oscillator. In fact, we show that quantum entrainment is here characterized by fluctuations driving an incoherent process between two metastable phases, which ultimately limits its temporal coherence when moving into the quantum regime. Finally, we discuss connections with the phenomena of dissipative phase transitions and transient synchronization in open quantum systems.
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