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Type: Journal article
Title: Optical dilution and feedback cooling of a gram-scale oscillator to 6.9 mK
Author: Corbitt, T.
Wipf, C.
Bodiya, T.
Ottaway, D.
Sigg, D.
Smith, N.
Whitcomb, S.
Mavalvala, N.
Citation: Physical Review Letters, 2007; 99(16):160801-1-160801-4
Publisher: American Physical Soc
Issue Date: 2007
ISSN: 0031-9007
Statement of
Thomas Corbitt, Christopher Wipf, Timothy Bodiya, David Ottaway, Daniel Sigg, Nicolas Smith, Stanley Whitcomb, and Nergis Mavalvala
Abstract: We report on the use of a radiation pressure induced restoring force, the optical spring effect, to optically dilute the mechanical damping of a 1 g suspended mirror, which is then cooled by active feedback (cold damping). Optical dilution relaxes the limit on cooling imposed by mechanical losses, allowing the oscillator mode to reach a minimum temperature of 6.9 mK, a factor of ~40 000 below the environmental temperature. A further advantage of the optical spring effect is that it can increase the number of oscillations before decoherence by several orders of magnitude. In the present experiment we infer an increase in the dynamical lifetime of the state by a factor of ~200.
Rights: ©2007 American Physical Society
RMID: 0020083035
DOI: 10.1103/PhysRevLett.99.160801
Appears in Collections:Physics publications

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