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Intracavity Squeezing Can Enhance Quantum-Limited Optomechanical Position Detection through Deamplification

MPG-Autoren
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Schwefel,  H. G. L.
Whispering Gallery Mode Resonator, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201126

Marquardt,  Ch.
Quantum Information Processing, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

/persons/resource/persons201125

Marquardt,  F.
Marquardt Group, Associated Groups, Max Planck Institute for the Science of Light, Max Planck Society;

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Zitation

Peano, V., Schwefel, H. G. L., Marquardt, C., & Marquardt, F. (2015). Intracavity Squeezing Can Enhance Quantum-Limited Optomechanical Position Detection through Deamplification. PHYSICAL REVIEW LETTERS, 115(24): 243603. doi:10.1103/PhysRevLett.115.243603.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-002D-633A-9
Zusammenfassung
It has been predicted and experimentally demonstrated that by injecting squeezed light into an optomechanical device, it is possible to enhance the precision of a position measurement. Here, we present a fundamentally different approach where the squeezing is created directly inside the cavity by a nonlinear medium. Counterintuitively, the enhancement of the signal-to-noise ratio works by deamplifying precisely the quadrature that is sensitive to the mechanical motion without losing quantum information. This enhancement works for systems with a weak optomechanical coupling and/or strong mechanical damping. This can allow for larger mechanical bandwidth of quantum-limited detectors based on optomechanical devices. Our approach can be straightforwardly extended to quantum nondemolition qubit detection.