Quantum Weak Force Sensing with Squeezed Magnomechanics

TL;DR

This paper demonstrates that squeezing magnons in cavity magnomechanics significantly enhances quantum force sensing, surpassing the standard quantum limit by two orders of magnitude and optimizing quantum noise reduction.

Contribution

It introduces a method to improve quantum force sensing in cavity magnomechanics by magnon squeezing, achieving substantial sensitivity enhancement beyond the SQL.

Findings

Two orders of magnitude improvement in force sensitivity.

Optimal homodyne angle regimes identified.

Potential for quantum precision measurements and information processing.

Abstract

Cavity magnomechanics, exhibiting remarkable experimental tunability, rich magnonic nonlinearities, and compatibility with various quantum systems, has witnessed considerable advances in recent years. However, the potential benefits of using cavity magnomechanical (CMM) systems in further improving the performance of quantum-enhanced sensing for weak forces remain largely unexplored. Here we show that the performance of a quantum CMM sensor can be significantly enhanced beyond the standard quantum limit (SQL), by squeezing the magnons. We find that, for comparable parameters, two orders of enhancement in force sensitivity can be achieved in comparison with the case without the magnon squeezing. Moreover, we show optimal parameter regimes of homodyne angle for minimizing added quantum noise. Our findings provide a promising approach for highly tunable and compatible quantum force sensing using hybrid CMM devices, with potential applications ranging from quantum precision measurements to quantum information processing.