Generation and Enhancement of Mechanical Squeezing in a Hybrid Cavity Magnomechanical System

Abstract

A scheme to generate mechanical squeezing of phonon mode in a hybrid cavity magnomechanical system composed of a yttrium iron garnet sphere and two auxiliary cavities and driven by a two-tone laser is proposed. It is found that the strong mechanical squeezing can be generated by optimizing the ratio of blue-detuned to red-detuned laser amplitude. However, the mechanical squeezing can not be generated when the blue-detuned laser is not applied. Furthermore, it is found that the two auxiliary cavities suppress the effect of the counter-rotating terms, leading to that the mechanical squeezing can break the 3 dB limit even when the dissipation rate of the magnon mode is much larger than the mechanical frequency. By contrast, if only one auxiliary cavity or no auxiliary cavity is coupled to magnon mode, the mechanical squeezing beyond 3 dB can not be achieved in a high dissipation of the magnon mode. This scheme provides an alternative way toward the practical implementation of mechanical squeezing in a hybrid cavity magnomechanical system.

Magnon squeezing enhanced entanglement in a cavity magnomechanical system

“…Comparing with the optomechanical systems [4][5][6][7][8], the CMM systems have the advantages of high adjustability and low loss. Hence this system can provide a promising vision for the realization of quantum information theory and macroscopic quantum states in hybrid quantum systems [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24].…”

Entanglement and Asymmetric Steering Between Distant Magnon and Mechanical Modes in an Optomagnonic‐Mechanical System

“…[36,37] Furthermore, several interesting physical effects have also been explored in cavity-magnon system, such as mechanical squeezing, high-order sideband generation, magnon blockade, ground-state cooling of phonon mode, and fast-slow light. [38][39][40][41][42][43] Recently, many schemes have been proposed to generate quantum entanglement between two magnon modes or two phonon modes in hybrid cavity-magnon system, [44][45][46][47] in which the cavity mode is driven by the squeezed light. However, the research on long-distance entanglement and asymmetric steering between phonon and magnon modes is relatively few.…”

Probabilistic resumable quantum teleportation for an arbitrary two-qubit entangled state with different quantum channels

“…As a transmission channel for quantum teleportation, quantum entanglement [17] is an important physical resource in many quantum information processing tasks [18][19][20][21][22]. The use of maximally entangled states as quantum channels usually means deterministic information processing tasks with unit fidelity.…”