Mechanical Squeezing via Fast Continuous Measurement

2019/11/30 by Chao Meng, George A. Brawley, James S. Bennett +2
Engineering · Physics and Astronomy · #Classical mechanics #Coherent states #Force Microscopy Techniques and Applications #Ground state #Mechanical and Optical Resonators #Oscillation (cell signaling) #Photonic and Optical Devices #Physics #Position (finance) #Quantum #Quantum measurement #Quantum mechanics #Quantum optics #Quantum state #cond-mat.mes-hall #physics.optics #quant-ph

paper · pdf · doi:10.1103/physrevlett.125.043604

published as Phys. Rev. Lett. 125, 043604 (2020)

openalex publication_date 2020/07/24 · arxiv created 2020/07/25 · arxiv updated 2020/07/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We revisit quantum state preparation of an oscillator by continuous linear position measurement. Quite general analytical expressions are derived for the conditioned state of the oscillator. Remarkably, we predict that quantum squeezing is possible outside of both the backaction dominated and quantum coherent oscillation regimes, relaxing experimental requirements even compared to ground-state cooling. This provides a new way to generate nonclassical states of macroscopic mechanical oscillators, and opens the door to quantum sensing and tests of quantum macroscopicity at room temperature.

Citations

• Back-action evasion and squeezing of a mechanical resonator using a cavity detector
• Input and output in damped quantum systems: Quantum stochastic differential equations and the master equation
• Feedback-control of quantum systems using continuous state-estimation
• Laser cooling of a nanomechanical oscillator into its quantum ground state
• Introduction to quantum noise, measurement, and amplification
• A quantum optomechanical interface beyond the resolved sideband limit
• Observing and Verifying the Quantum Trajectory of a Mechanical Resonator
• Cavity Optomechanics