Coherent Cancellation of Backaction Noise in optomechanical Force Measurements
arXiv:1403.2992 · doi:10.1103/PhysRevA.89.053836
Abstract
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 in 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.
9 pages, 6 figures
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- All-optical coherent quantum-noise cancellation in cascaded optomechanical systems
- Geometric control theory for quantum back-action evasion
- Weak force sensing based on optical parametric amplification in a cavity optomechanical system coupled in series with two oscillators
- Can the phase of radiation pressure fluctuations be flipped in a single path for laser interferometric gravitational wave detectors?
- Quantum limits on detection sensitivity of a linear detector with feedback
- Force Tracking in Cavity Optomechanics with a Two-Level Quantum System by Kalman Filtering