Implementation and enhancement of nonreciprocal quantum synchronization with strong isolation in antiferromagnet-cavity systems

TL;DR

This paper demonstrates how to achieve nonreciprocal quantum synchronization between magnon modes in an antiferromagnet-cavity system, enabling directional control of quantum signals with potential experimental feasibility.

Contribution

It introduces a novel scheme for nonreciprocal quantum synchronization in antiferromagnet-cavity systems, leveraging strong isolation and specific interactions.

Findings

Nonreciprocal quantum synchronization depends on cavity resonance frequency.

Synchronization is enhanced by increasing interaction strength.

Numerical simulations suggest experimental feasibility.

Abstract

Sensitive signal detection and processing in classical world, especially in quantum regime, require nonreciprocal manipulation. In this paper we show how to achieve nonreciprocal quantum synchronization for two magnon modes in a two-sublattice antiferromagnet with strong isolation.The antiferromagnet is trapped in a cavity with two posts so that the two magnon modes not only couple to each other through a parametric-type interaction, but also interact with a same cavity respectively in a beam splitter-type and parametric-type ways. Under the condition of system's stability, we show that nonreciprocal quantum synchronization between two magnon modes is mainly dependent on resonance frequency of the cavity caused by direction of input currents. In addition,quantum synchronization is enhanced by the increase of interaction strength between two Bogoliubov modes and cavity mode. Moreover, numerical simulation results with parameters commonly used in current experiments show that the present scheme may be feasible.