Macroscopic distant magnon-mode entanglement via a squeezed drive

TL;DR

This paper proposes a scheme to generate robust bipartite and tripartite entanglement between distant magnon modes in a cavity array using a squeezed reservoir, with potential applications in quantum information processing.

Contribution

It introduces a novel method for entangling distant magnon modes via a single squeezed reservoir in a cavity array, enhancing robustness and scalability.

Findings

Successful generation of bipartite and tripartite magnon entanglement

Steady-state entanglement is robust against dissipation and temperature

Entanglement achieved with a single quantum reservoir

Abstract

The generation of robust entanglement in quantum system arrays is a crucial aspect of the realization of efficient quantum information processing. Recently, the field of quantum magnonics has garnered significant attention as a promising platform for advancing in this direction. In our proposed scheme, we utilize a one-dimensional array of coupled cavities, with each cavity housing a single yttrium iron garnet (YIG) sphere coupled to the cavity mode through magnetic dipole interaction. To induce entanglement between YIGs, we employ a local squeezed reservoir, which provides the necessary nonlinearity for entanglement generation. Our results demonstrate the successful generation of bipartite and tripartite entanglement between distant magnon modes, all achieved through a single quantum reservoir. Furthermore, the steady-state entanglement between magnon modes is robust against magnon dissipation rates and environment temperature. Our results may lead to applications of cavity-magnon arrays in quantum information processing and quantum communication systems.