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This research identifies quantum phase slips as an intrinsic degradation mechanism for synchronization in continuous variable systems, distinct from classical noise disruptions. By modeling these dynamics via Keldysh path integrals, the study clarifies fundamental limits on maintaining stable oscillations even under strong phase correlations. These findings are critical for advancing error mitigation strategies and coherence preservation in complex superconducting quantum architectures.

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Quantum Systems Lose Synchronisation Via Newly Observed ‘phase Slips’

Quantum Zeitgeist5 iunie 20266 min de cititArticolul și perspectiva sunt în engleză.

Quantum systems, previously understood to maintain stable oscillations, now reveal a hidden vulnerability to degradation via quantum phase slips. This work extends the analysis of synchronization to include diffusive phase-slip dynamics induced by quantum fluctuations, a feature not previously considered in the context of quantum synchronization of limit cycles. By modelling limit cycles with a Keldysh path integral, the underlying mechanism of phase locking breakdown is clarified, even with strong phase correlations.

A thorough investigation into the breakdown of quantum synchronisation in self-sustained oscillators reveals a phenomenon analogous to phase locking in classical systems. Hans Christiansen and Jens Paaske at Niels Bohr Institute, in collaboration with University of Copenhagen, show how quantum phase slips degrade phase locking within continuous variable quantum systems, utilising a Keldysh path integral formulation of limit cycles. The work elucidates the impact of quantum noise on synchronisation and addresses non-Markovian effects, specifically within superconducting resonators coupled via a voltage biased double quantum dot, offering key insights into the behaviour of complex quantum systems. The phenomenon of synchronisation, where coupled oscillators adjust their…

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