期刊
NEW JOURNAL OF PHYSICS
卷 11, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/11/7/073032
关键词
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资金
- United States National Science Foundation
- Science and Technology Facilities Council of the United Kingdom
- Max-Planck-Society
- State of Niedersachsen/Germany
- Australian Research Council
- Council of Scientific and Industrial Research of India
- Istituto Nazionale di Fisica Nucleare of Italy
- Spanish Ministerio de Educacion y Ciencia
- Conselleria d'Economia Hisenda i Innovacio of the Govern de les Illes Balears
- Scottish Funding Council
- Scottish Universities Physics Alliance
- The National Aeronautics and Space Administration
- Carnegie Trust
- Leverhulme Trust
- David and Lucile Packard Foundation
- Research Corporation
- Alfred P Sloan Foundation
- Science and Technology Facilities Council [PP/F00110X/1, PP/F001096/1, PP/E001203/1, ST/G504284/1, PP/F001118/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Physics [0653653, 0757058] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [0905184, 855313] Funding Source: National Science Foundation
- STFC [PP/E001203/1, PP/F001096/1, PP/F00110X/1, ST/G504284/1, PP/F001118/1] Funding Source: UKRI
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 lie within this optimal band, where its effective temperature falls as low as 1.4 mu K, and its occupation number reaches about 200 quanta. This work shows how the exquisite sensitivity necessary to detect gravitational waves can be made available to probe the validity of quantum mechanics on an enormous mass scale.
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