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The following article is Open access
Observation of a kilogram-scale oscillator near its quantum ground state
B Abbott1, R Abbott1, R Adhikari1, P Ajith2, B Allen2,3, G Allen4, R Amin5, S B Anderson1, W G Anderson3, M A Arain6, M Araya1, H Armandula1, P Armor3, Y Aso7, S Aston8, P Aufmuth9, C Aulbert2, S Babak10, S Ballmer1, H Bantilan11, B C Barish1, C Barker12, D Barker12, B Barr13, P Barriga14, M A Barton13, M Bastarrika13, K Bayer15, J Betzwieser1, P T Beyersdorf16, I A Bilenko17, G Billingsley1, R Biswas3, E Black1, K Blackburn1, L Blackburn15, D Blair14, B Bland12, T P Bodiya15, L Bogue18, R Bork1, V Boschi1, S Bose19, P R Brady3, V B Braginsky17, J E Brau20, M Brinkmann2, A Brooks1, D A Brown21, G Brunet15, A Bullington4, A Buonanno22, O Burmeister2, R L Byer4, L Cadonati23, G Cagnoli13, J B Camp24, J Cannizzo24, K Cannon1, J Cao15, L Cardenas1, T Casebolt4, G Castaldi25, C Cepeda1, E Chalkley13, P Charlton26, S Chatterji1, S Chelkowski8, Y Chen10,27, N Christensen11, D Clark4, J Clark13, T Cokelaer28, R Conte29, D Cook12, T Corbitt15, D Coyne1, J D E Creighton3, A Cumming13, L Cunningham13, R M Cutler8, J Dalrymple21, S Danilishin17, K Danzmann2,9, G Davies28, D DeBra4, J Degallaix10, M Degree4, V Dergachev30, S Desai31, R DeSalvo1, S Dhurandhar32, M Díaz33, J Dickson34, A Dietz28, F Donovan15, K L Dooley6, E E Doomes35, R W P Drever36, I Duke15, J-C Dumas14, R J Dupuis1, J G Dwyer7, C Echols1, A Effler12, P Ehrens1, E Espinoza1, T Etzel1, T Evans18, S Fairhurst28, Y Fan14, D Fazi1, H Fehrmann2, M M Fejer4, L S Finn31, K Flasch3, N Fotopoulos3, A Freise8, R Frey20, T Fricke1,37, P Fritschel15, V V Frolov18, M Fyffe18, J Garofoli12, I Gholami10, J A Giaime5,18, S Giampanis37, K D Giardina18, K Goda15, E Goetz30, L Goggin1, G González5, S Gossler2, R Gouaty5, A Grant13, S Gras14, C Gray12, M Gray34, R J S Greenhalgh38, A M Gretarsson39, F Grimaldi15, R Grosso33, H Grote2, S Grunewald10, M Guenther12, E K Gustafson1, R Gustafson30, B Hage9, J M Hallam8, D Hammer3, C Hanna5, J Hanson18, J Harms2, G Harry15, E Harstad20, K Hayama33, T Hayler38, J Heefner1, I S Heng13, M Hennessy4, A Heptonstall13, M Hewitson2, S Hild8, E Hirose21, D Hoak18, D Hosken40, J Hough13, S H Huttner13, D Ingram12, M Ito20, A Ivanov1, B Johnson12, W W Johnson5, D I Jones41, G Jones28, R Jones13, L Ju14, P Kalmus7, V Kalogera42, S Kamat7, J Kanner22, D Kasprzyk8, E Katsavounidis15, K Kawabe12, S Kawamura43, F Kawazoe43, W Kells1, D G Keppel1, F Ya Khalili17, R Khan7, E Khazanov44, C Kim42, P King1, J S Kissel5, S Klimenko6, K Kokeyama43, V Kondrashov1, R K Kopparapu31, D Kozak1, I Kozhevatov44, B Krishnan10, P Kwee9, P K Lam34, M Landry12, M M Lang31, B Lantz4, A Lazzarini1, M Lei1, N Leindecker4, V Leonhardt43, I Leonor20, K Libbrecht1, H Lin6, P Lindquist1, N A Lockerbie45, D Lodhia8, M Lormand18, P Lu4, M Lubinski12, A Lucianetti6, H Lück2,9, B Machenschalk2, M MacInnis15, M Mageswaran1, K Mailand1, V Mandic46, S Márka7, Z Márka7, A Markosyan4, J Markowitz15, E Maros1, I Martin13, R M Martin6, J N Marx1, K Mason15, F Matichard5, L Matone7, R Matzner47, N 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Riesen18, K Riles30, B Rivera12, N A Robertson1,13, C Robinson28, E L Robinson8, S Roddy18, A Rodriguez5, A M Rogan19, J Rollins7, J D Romano33, J Romie18, R Route4, S Rowan13, A Rüdiger2, L Ruet15, P Russell1, K Ryan12, S Sakata43, M Samidi1, L Sancho de la Jordana51, V Sandberg12, V Sannibale1, S Saraf52, P Sarin15, B S Sathyaprakash28, S Sato43, P R Saulson21, R Savage12, P Savov27, S W Schediwy14, R Schilling2, R Schnabel2, R Schofield20, B F Schutz10,28, P Schwinberg12, S M Scott34, A C Searle34, B Sears1, F Seifert2, D Sellers18, A S Sengupta1, P Shawhan22, D H Shoemaker15, A Sibley18, X Siemens3, D Sigg12, S Sinha4, A M Sintes10,51, B J J Slagmolen34, J Slutsky5, J R Smith21, M R Smith1, N D Smith15, K Somiya2,10, B Sorazu13, L C Stein15, A Stochino1, R Stone33, K A Strain13, D M Strom20, A Stuver18, T Z Summerscales53, K-X Sun4, M Sung5, P J Sutton28, H Takahashi10, D B Tanner6, R Taylor1, R Taylor13, J Thacker18, K A Thorne31, K S Thorne27, A Thüring9, K V Tokmakov13, C Torres18, C Torrie13, G Traylor18, M Trias51, W Tyler1, D Ugolini54, J Ulmen4, K Urbanek4, H Vahlbruch9, C Van Den Broeck28, M van der Sluys42, S Vass1, R Vaulin3, A Vecchio8, J Veitch8, P Veitch40, A Villar1, C Vorvick12, S P Vyatchanin17, S J Waldman1, L Wallace1, H Ward13, R Ward1, M Weinert2, A Weinstein1, R Weiss15, S Wen5, K Wette34, J T Whelan10, S E Whitcomb1, B F Whiting6, C Wilkinson12, P A Willems1, H R Williams31, L Williams6, B Willke2,9, I Wilmut38, W Winkler2, C C Wipf15, A G Wiseman3, G Woan13, R Wooley18, J Worden12, W Wu6, I Yakushin18, H Yamamoto1, Z Yan14, S Yoshida50, M Zanolin39, J Zhang30, L Zhang1, C Zhao14, N Zotov55, M Zucker15, J Zweizig1 and (LIGO Scientific Collaboration)
Published 16 July 2009 •
Published under licence by IOP Publishing Ltd
New Journal of Physics,
Volume 11,
July 2009
Citation B Abbott et al 2009 New J. Phys.11 073032DOI 10.1088/1367-2630/11/7/073032
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 μK, 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.