Microwave Amplification in a PT -symmetric-like Cavity Magnomechanical System

TL;DR

This paper proposes a tunable magnomechanical amplification scheme in a PT-symmetric-like cavity system, achieving high signal amplification and slow-light effects with potential quantum information applications.

Contribution

It introduces a novel PT-symmetric-like cavity magnomechanical system enabling large amplification and slow-light phenomena for quantum technologies.

Findings

Amplification of microwave signals can reach up to 1,000,000 times.

Achieved group delay of light up to 0.000035 seconds.

Potential applications in quantum information processing and optical switching.

Abstract

We propose a scheme that can generate tunable magnomechanically induced amplification in a double-cavity parity-time-(PT -) symmetric-like magnomechanical system under a strong control and weak probe field. The system consists of a ferromagnetic-material yttrium iron garnet (YIG) sphere placed in a passive microwave cavity which is connected with another active cavity. We reveal that ideally induced amplification of the microwave probe signal may reach the maximum value 1000000 when cavity-cavity, cavity-magnon and magnomechanical coupling strengths are nonzero simultaneously. The phenomenon might have potential applications in the field of quantum information processing and quantum optical devices. Besides, we also find the phenomena of slow-light propagation. In this case, group speed delay of the light can achieve 0.000035s, which can enhance some nonlinear effect. Moreover, due to the relatively flat dispersion curve, the proposal may be applied to sensitive optical switches, which plays an important role in storing photons and quantum optical chips.