Two-Tone Optomechanical Instability and Its Fundamental Implications for Backaction-Evading Measurements

13 Nov 2019 Shomroni Itay Youssefi Amir Sauerwein Nick Qiu Liu Seidler Paul Malz Daniel Nunnenkamp Andreas Kippenberg Tobias J.

While quantum mechanics imposes a fundamental limit on the precision of interferometric measurements of mechanical motion due to measurement backaction, the nonlinear nature of the coupling also leads to parametric instabilities that place practical limits on the sensitivity by limiting the power in the interferometer. Such instabilities have been extensively studied in the context of gravitational wave detectors, and their presence has recently been reported in Advanced LIGO... (read more)

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  • QUANTUM PHYSICS