Metastable quantum entrainment
- URL: http://arxiv.org/abs/2109.01438v1
- Date: Fri, 3 Sep 2021 10:58:21 GMT
- Title: Metastable quantum entrainment
- Authors: Albert Cabot, Gian Luca Giorgi, Roberta Zambrini
- Abstract summary: We show that quantum entrainment is here characterized by fluctuations driving an incoherent process between two metastable phases.
We discuss connections with the phenomena of dissipative phase transitions and transient synchronization in open quantum systems.
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- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: 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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