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Synchronization along quantum trajectories

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arxiv 1910.03325 v3 pith:QN65CL3I submitted 2019-10-08 quant-ph cond-mat.stat-mech

classification quant-phcond-mat.stat-mech
keywords quantumsynchronizationtrajectoriesalongphase-lockingapproachcasecharacterize
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We employ a quantum trajectory approach to characterize synchronization and phase-locking between open quantum systems in nonequilibrium steady states. We exemplify our proposal for the paradigmatic case of two quantum Van der Pol oscillators interacting through dissipative coupling. We show the deep impact of synchronization on the statistics of phase-locking indicators and other correlation measures defined for single trajectories, spotting a link between the presence of synchronization and the emergence of large tails in the probability distribution for the entanglement along trajectories. Our results shed new light on fundamental issues regarding quantum synchronization providing new methods for its precise quantification.

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