Enhancement of quantum synchronization via continuous measurement and feedback control
arXiv:2009.05468 · doi:10.1088/1367-2630/abd7be
Abstract
We study synchronization of a quantum van der Pol oscillator with a harmonic drive and demonstrate that quantum synchronization can be enhanced by performing continuous homodyne measurement on an additional bath linearly coupled to the oscillator and applying feedback control to the oscillator. The phase coherence of the oscillator is increased by reducing quantum fluctuations via the continuous measurement, whereas the measurement backaction inevitably induces fluctuations around the phase-locking point. We propose a simple feedback policy for suppressing measurement-induced fluctuations by adjusting the frequency of the harmonic drive, which results in enhancement of quantum synchronization. We further demonstrate that the maximum enhancement of quantum synchronization is achieved by performing quantum measurement on the quadrature angle at which the phase diffusion of the oscillator is the largest and the maximal information of the oscillator phase is extracted.
15 pages, 9 figures
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Cited by in corpus (11)
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- Symmetries and Synchronization Blockade
- Quantum asymptotic phase reveals signatures of quantum synchronization
- Classical-driving-assisted quantum synchronization in non-Markovian environments
- Enhancing quantum synchronization through homodyne measurement, noise and squeezing
- Fisher information as general metrics of quantum synchronization
- A definition of the asymptotic phase for quantum nonlinear oscillators from the Koopman operator viewpoint
- Lie Algebraic Quantum Phase Reduction
- Entanglement signatures for quantum synchronization with single-ion phonon laser
- Instantaneous phase synchronization of two decoupled quantum limit-cycle oscillators induced by conditional photon detection
- Quantum limit cycles and synchronization from a measurement perspective