Observation of a kilogram-scale oscillator near its quantum ground state
Dickson, James; Gray, Malcolm; Lam, Ping Koy; McClelland, David; McKenzie, Kirk; Mow-Lowry, C; Rabeling, David; Scott, Susan M; Searle, Antony; Slagmolen, Bram; Wette, Karl; Abbott, Robert; Ajith, P; Aso, Y; Aston, S; Aufmuth, P; Babak, S; Bantilan, H; Miao, H; Ya Khalili, F; Conte, R.; Veitch, Peter John; Heefner, J; Hosken, Dave; Hough, J; Ivanov, A
We introduce a novel cooling technique capable of approaching the quantum ground state of a kilogram-scale system-an interferometric gravitational wave detector. The detectors of the Laser Interferometer Gravitational-wave Observatory (LIGO) operate within a factor of 10 of the standard quantum limit (SQL), providing a displacement sensitivity of 10-18 m in a 100 Hz band centered on 150 Hz. With a new feedback strategy, we dynamically shift the resonant frequency of a 2.7 kg pendulum mode to...[Show more]
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|Source:||New Journal of Physics|
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