Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 6: Precision Measurements and Metrology II (with Q)

A 6.5: Vortrag

Montag, 23. März 2015, 15:45–16:00, P/H1

Coherent Quantum Noise Cancellation — •Daniel Steinmeyer1,3, Maximilian H. Wimmer1,3, Klemens Hammerer1,2, and Michèle Heurs1,31Institut für Gravitationsphysik, Leibniz Universität Hannover, Hannover, Germany — 2Institut für Theoretische Physik, Leibniz Universität Hannover, Hannover, Germany — 3Max-Planck-Institut für Gravitationsphysik (Albert-Einstein-Institut), Hannover, Germany

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. First steps towards such an experiment will be reported.

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DPG-Physik > DPG-Verhandlungen > 2015 > Heidelberg