Volume 81, Number 1, January 2008
|Number of page(s)||5|
|Published online||19 November 2007|
Quantum nondemolition measurement of discrete Fock states of a nanomechanical resonator
Department of Electrical Engineering, Technion - Haifa 32000, Israel
2 Department of Physics and Astronomy, Dartmouth College - Hanover, NH, USA
Accepted: 24 October 2007
We study theoretically a radio frequency superconducting interference device integrated with a nanomechanical resonator and an LC resonator. By applying adiabatic and rotating-wave approximations, we obtain an effective Hamiltonian that governs the dynamics of the mechanical and LC resonators. Nonlinear terms in this Hamiltonian can be exploited for performing a quantum nondemolition measurement of Fock states of the nanomechanical resonator. We address the feasibility of experimental implementation and show that the nonlinear coupling can be made sufficiently strong to allow the detection of discrete mechanical Fock states.
PACS: 03.65.Yz – Decoherence; open systems; quantum statistical methods / 85.25.Dq – Superconducting quantum interference devices (SQUIDs)
© EPLA, 2008
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