Macroscopic quantum synchronization effects

TL;DR

This paper theoretically investigates how quantum properties influence synchronization in large networks of coupled quantum oscillators, revealing unique blockade effects and emergent behaviors absent in classical systems.

Contribution

It introduces a theoretical framework for macroscopic quantum synchronization, highlighting the impact of quantum properties on collective dynamics in large networks.

Findings

Quantum properties cause a blockade of collective synchronization.

Emergent behaviors appear at the macroscopic level not seen in two-oscillator systems.

Synchronization transition is marked by global phase coherence.

Abstract

We theoretically describe macroscopic quantum synchronization effects occurring in a network of all-to-all coupled quantum limit-cycle oscillators. The coupling causes a transition to synchronization as indicated by the presence of global phase coherence. We demonstrate that the microscopic quantum properties of the oscillators qualitatively shape the synchronization behavior in a macroscopically large network. Specifically, they result in a blockade of collective synchronization that is not expected for classical oscillators. Additionally, the macroscopic ensemble shows emergent behavior not present at the level of two coupled quantum oscillators.