Magnon-microwave backaction noise evasion in cavity magnomechanics
arXiv:2403.17185 · doi:10.1038/s42005-025-02017-0
Abstract
In cavity magnomechanical systems, magnetic excitations couple simultaneously with mechanical vibrations and microwaves, incorporating the tunability of magnetism and the long lifetimes of mechanical modes. Applications of such systems, such as thermometry and sensing, require precise measurement of the mechanical degree-of-freedom. In this paper, we propose a scheme for realizing backaction evading measurements of the mechanical vibrations in cavity magnomechanics. Our proposal involves driving the microwave cavity with two tones separated by twice the phonon frequency and with amplitudes satisfying a balance relation. We show that the minimum added imprecision noise is obtained for drives centered around the lower frequency magnon-microwave polaritons, which can beat the standard quantum limit at modest drive amplitudes. Our scheme is a simple and flexible way of engineering backaction evasion measurements that can be further generalized to other multimode systems.
arXiv commentRevised version. 9 Pages, 8 Figures plus supplementary information (11 pages, 2 figures)
References in corpus (27)
- Cavity Optomechanics
- Introduction to Quantum Noise, Measurement and Amplification
- Strongly coupled magnons and cavity microwave photons
- High cooperativity in coupled microwave resonator ferrimagnetic insulator hybrids
- Hybrid quantum systems based on magnonics
- Magnon-photon-phonon entanglement in cavity magnomechanics
- Cavity Magnonics
- Qubit-photon interactions in a cavity: Measurement induced dephasing and number splitting
- Back-action evasion and squeezing of a mechanical resonator using a cavity detector
- Back-action Evading Measurements of Nanomechanical Motion
- Quantum back action evading measurement of motion in a negative mass reference frame
- Experimental observation of exceptional surface in synthetic dimensions with magnon polaritons
- Entangling the vibrational modes of two massive ferromagnetic spheres using cavity magnomechanics
- Quantum back-action evading measurement of collective mechanical modes
- Two-mode back-action-evading measurements in cavity optomechanics
- Squeezing Microwaves by Magnetostriction
- Optical Backaction-Evading Measurement of a Mechanical Oscillator
- Theory of Quantum Acoustomagnonics and Acoustomechanics with a Micromagnet
- Magnon-Phonon Quantum Correlation Thermometry
- Strong magnon-photon coupling within a tunable cryogenic microwave cavity
- Phonon Quantum Nondemolition Measurements in Nonlinearly Coupled Optomechanical Cavities
- Dynamical Backaction Evading Magnomechanics
- Magnomechanical backaction corrections due to coupling to higher order Walker modes and Kerr nonlinearities
- Strong squeezing of microwave output fields via reservoir-engineered cavity magnomechanics
- Quantum backaction evading measurements of a silicon nitride membrane resonator
- Shelving-style QND phonon-number detection in quantum optomechanics
- Quantum Back-action Limits in Dispersively Measured Bose-Einstein Condensates