Quantum magnetomechanics : ultrahigh-Q-levitated mechanical oscillators | Macquarie University ResearchOnline

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Title: Quantum magnetomechanics : ultrahigh-Q-levitated mechanical oscillators
Related: Physical review letters, Vol. 109, No. 14, (2012), p.147206-1-147206-5
DOI: 10.1103/PhysRevLett.109.147206
Publisher: American Physical Society
Date: 2012
Author/Creator: Cirio, M
Author/Creator: Brennen, G. K
Author/Creator: Twamley, J
Description: Engineering nanomechanical quantum systems possessing ultralong motional coherence times allows for applications in precision quantum sensing and quantum interfaces, but to achieve ultrahigh motional Q one must work hard to remove all forms of motional noise and heating. We examine a magneto-meso-mechanical quantum system that consists of a 3D arrangement of miniature superconducting loops which is stably levitated in a static inhomogeneous magnetic field. The motional decoherence is predominantly due to loss from induced eddy currents in the magnetized sphere which provides the trapping field ultimately yielding Q∼109 with motional oscillation frequencies of several hundreds of kilohertz. By inductively coupling this levitating object to a nearby driven flux qubit one can cool its motion very close to the ground state and this may permit the generation of macroscopic entangled motional states of multiple clusters.
Description: 5 page(s)
Resource Type: journal article
Organisation: Macquarie University. Dept. of Physics and Astronomy

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