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Magnon-squeezing-enhanced weak magnetic field sensing in cavity-magnon system

Authors :
Liu, Zheng
Liu, Yu-qiang
Yang, Yi-jia
Yu, Chang-shui
Publication Year :
2024

Abstract

Quantum noise and thermal noise are the two primary sources of noise that limit the sensitivity of weak magnetic field sensing. Although quantum noise has been widely addressed, effectively reducing thermal noise remains challenging in detecting weak magnetic fields. We employ an anisotropic elliptical YIG sphere as a magnetic field probe to establish a parametric amplification interaction of magnons and induce magnon squeezing effects. These effects can effectively suppress thermal noise in the magnon mode and amplify weak magnetic field signals from external sources. Specifically, complete suppression of thermal noise can be achieved by placing the YIG sphere in a squeezed vacuum reservoir. Our scheme has the potential to inspire advancements in thermal noise suppression for quantum sensing.

Subjects

Subjects :
Quantum Physics

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2408.01905
Document Type :
Working Paper