2014/03/12 by M. H. Wimmer, Maximilian H. Wimmer, Daniel Steinmeyer +3
Engineering · Physics and Astronomy · #Classical mechanics #Computer science #Detector #Electronic engineering #Engineering #Geophysics and Sensor Technology #Limit (mathematics) #Limiting #Mechanical and Optical Resonators #Noise (video) #Optics #Optomechanics #Physics #Pulsars and Gravitational Waves Research #Quantum #Quantum limit #Quantum mechanics #Quantum noise #Sensitivity (control systems) #cond-mat.mes-hall #gr-qc #quant-ph
paper · pdf · doi:10.1103/physreva.89.053836
published as Phys. Rev. A 89, 053836 (2014) · 9 pages, 6 figures
arxiv created 2014/03/12 · openalex publication_date 2014/05/28 · arxiv updated 2014/06/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Optomechanical detectors have reached the standard quantum limit in position and force sensing where measurement backaction noise starts to be the limiting factor for the sensitivity. A strategy to circumvent measurement backaction and surpass the standard quantum limit has been suggested by M. Tsang and C. Caves [Phys. Rev. Lett. 105, 123601 (2010)]. We provide a detailed analysis of this method and assess its benefits, requirements, and limitations. We conclude that a proof-of-principle demonstration based on a micro-optomechanical system is demanding but possible. However, for parameters relevant to gravitational-wave detectors, the requirements for backaction evasion appear to be prohibitive.