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TT: Tiefe Temperaturen
TT 10: Symposium Solid State Meets Quantum Optics
TT 10.2: Invited Talk
Monday, March 27, 2006, 15:00–15:30, HSZ 02
Cooper-Pair Molasses: Cooling a Nanomechanical Resonator with Quantum Noise — •Keith Schwab1, Akshay Naik1, Olivier Buu1, Matthew LaHaye1, Aashish Clerk2, Andrew Armour3, and Miles Blencowe4 — 1Laboratory for Physical Sciences and University of Maryland, College Park — 2McGill University — 3University of Nottingham — 4Dartmouth College
We are performing ultra-low temperature experiments with a radio-frequency, nanomechanical resonator coupled to a superconducting single electron transistor, a system which has demonstrated the closest approach to the uncertainty principle for continuous position detection, and the closest approach to the quantum ground state of a mechanical system [1]. Recently, we have used the resonator to detect the asymmetric, quantum noise of the SET, which produces the back-action close to what is required by the uncertainty principle. In addition, have discovered an unexpected cooling mechanism, analogous to optical molasses, which is a result of resonant Josephson effects in the transistor. Using these techniques and devices, we are anticipating the observation of squeezed, superposition, and entangled states of a mechanical device. One future application for this technology could be in quantum information devices.
[1] LaHaye, Buu, Camarota, Schwab, No-dqApproaching the Quantum Limit of a Nanomechanical Resonator,No-dq Science 304, 74 (2004).