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Coherent Cancellation of Backaction Noise in optomechanical Force Measurements

MPS-Authors
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Wimmer,  Maximilian
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Hammerer,  Klemens
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Heurs,  Michele
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Fulltext (public)

1403.2992.pdf
(Preprint), 9MB

PhysRevA.89.pdf
(Any fulltext), 537KB

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Citation

Wimmer, M., Steinmeyer, D., Hammerer, K., & Heurs, M. (2014). Coherent Cancellation of Backaction Noise in optomechanical Force Measurements. Physical Review A, 89: 053836. doi:10.1103/PhysRevA.89.053836.


Cite as: http://hdl.handle.net/11858/00-001M-0000-001A-0E37-D
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.