Ground state cooling of a nanomechanical resonator via a Cooper pair box qubit

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dc.creatorJaehne, Konstanze
dc.creatorHammerer, Klemens
dc.creatorWallquist, Margareta
dc.date2008-04-03
dc.date2008-09-18
dc.date.accessioned2026-07-07T10:07:36Z
dc.date.available2026-07-07T10:07:36Z
dc.descriptionIn this paper we present a scheme for ground state cooling of a flexural mode of a nanomechanical beam incorporated in a loop-shaped Cooper-pair box (CPB) circuit. Via the Lorentz force coupling of the beam motion to circulating CPB-circuit currents, energy is transferred to the CPB qubit which acts as a dissipative two-level system. The cooling process is driven by a detuned gate-voltage drive acting on the CPB. We analyze the cooling force spectrum and present analytical expressions for the cooling rate and final occupation number for a wide parameter regime. In particular, we find that cooling is optimized in a strong drive regime, and we present the necessary conditions for ground-state cooling.
dc.description24 pages, 6 figures, accepted for publication in NJP special issue 'Mechanical Systems at the Quantum Limit'
dc.identifierhttps://arxiv.org/abs/0804.0603
dc.identifierhttp://arxiv.org/abs/0804.0603
dc.identifierNew J. Phys. 10 (2008) 095019
dc.identifierdoi:10.1088/1367-2630/10/9/095019
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/170693
dc.subjectOther Condensed Matter
dc.subjectQuantum Physics
dc.titleGround state cooling of a nanomechanical resonator via a Cooper pair box qubit
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