Nonreciprocal magnon blockade based on nonlinear effects

TL;DR

This paper proposes a new method to achieve nonreciprocal magnon blockade using nonlinear interactions in a hybrid microwave cavity-YIG system, enabling single magnon control for quantum information applications.

Contribution

It introduces an alternative scheme utilizing nonlinear effects and weak parametric driving to realize nonreciprocal magnon blockade in a hybrid system.

Findings

Nonreciprocal magnon blockade achieved via nonlinear interactions.

Kerr nonlinearity in the pump cavity enhances nonreciprocity.

Potential for single magnon resource preparation for quantum info.

Abstract

We present an alternative scheme to achieve nonreciprocal unconventional magnon blockade (NUMB) in a hybrid system formed by two microwave cavities and one yttrium iron garnet (YIG) sphere, where the pump and signal cavities interact nonlinearly with each other and the signal cavity is coupled to the YIG sphere. It is found that the nonlinear coupling occurs between the pump cavity and magnon modes due to the dispersive interactions among three bosonic modes. Meanwhile, the Kerr nonlinearity is present in the pump cavity. Based on these nonlinear effects, a nonreciprocal magnon blockade could be achieved with the help of weak parametric driving of the pump cavity. The present work provides an alternative method to prepare single magnon resource, which may be helpful for quantum information processing.