Quantum measurement of a coupled nanomechanical resonator–Cooper-pair box system
Quantum measurement of a coupled nanomechanical resonator–Cooper-pair box system
We show two effects as a result of considering the second-order correction to the spectrum of a nanomechanical resonator electrostatically coupled to a Cooper-pair box. The spectrum of the Cooper-pair box is modified in a way which depends on the Fock state of the resonator. Similarly, the frequency of the resonator becomes dependent upon the state of the Cooper-pair box. We consider whether these frequency shifts could be utilized to prepare the nanomechanical resonator in a Fock state, to perform a quantum non-demolition measurement of the resonator Fock state, and to distinguish the phase states of the Cooper-pair box.
Twyeffort Irish, E. K.
b78b8d7c-c747-4437-bb6f-189186713998
Schwab, K.
81e78e2a-856a-4fe9-b662-00fbf2e0e0b2
15 October 2003
Twyeffort Irish, E. K.
b78b8d7c-c747-4437-bb6f-189186713998
Schwab, K.
81e78e2a-856a-4fe9-b662-00fbf2e0e0b2
Twyeffort Irish, E. K. and Schwab, K.
(2003)
Quantum measurement of a coupled nanomechanical resonator–Cooper-pair box system.
Physical Review B - Condensed Matter and Materials Physics, 68 (15), [144311].
(doi:10.1103/PhysRevB.68.155311).
Abstract
We show two effects as a result of considering the second-order correction to the spectrum of a nanomechanical resonator electrostatically coupled to a Cooper-pair box. The spectrum of the Cooper-pair box is modified in a way which depends on the Fock state of the resonator. Similarly, the frequency of the resonator becomes dependent upon the state of the Cooper-pair box. We consider whether these frequency shifts could be utilized to prepare the nanomechanical resonator in a Fock state, to perform a quantum non-demolition measurement of the resonator Fock state, and to distinguish the phase states of the Cooper-pair box.
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Published date: 15 October 2003
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Local EPrints ID: 494606
URI: http://eprints.soton.ac.uk/id/eprint/494606
ISSN: 1550-235X
PURE UUID: 66d1ad32-b264-49d1-b536-270aa7392eb5
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Date deposited: 10 Oct 2024 17:05
Last modified: 11 Oct 2024 01:47
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Author:
K. Schwab
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