Observing quantum synchronization blockade in circuit quantum electrodynamics

Simon E. Nigg
2018 Physical Review A  
High quality factors, strong nonlinearities, and extensive design flexibility make superconducting circuits an ideal platform to investigate synchronization phenomena deep in the quantum regime. Recently Loerch-2017, it was predicted that energy quantization and conservation can block the synchronization of two identical, weakly coupled nonlinear self-oscillators. Here we propose a Josephson junction circuit realization of such a system along with a simple homodyne measurement scheme to observe
more » ... this effect. We also show that at finite detuning, where phase synchronization takes place, the two oscillators are entangled in the steady state as witnessed by the positivity of the logarithmic negativity.
doi:10.1103/physreva.97.013811 fatcat:msafsyoyxfehla5r76apw7q3my