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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]

CollectionsANU Research Publications
Date published: 2009
Type: Journal article
Source: New Journal of Physics
DOI: 10.1088/1367-2630/11/7/073032


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