Quantum measurement of a coupled nanomechanical resonator–Cooper-pair box system

2003/01/31 by E. K. Twyeffort Irish, Elinor K. Irish, Keith Schwab +1 · 4 citations
Engineering · Physics and Astronomy · #Force Microscopy Techniques and Applications #Mechanical and Optical Resonators #Photonic and Optical Devices #cond-mat.mes-hall #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.68.155311

arxiv created 2003/07/31 · openalex publication_date 2003/10/15 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

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.

Citations

• Quantum Computing with Quantum Dots on Linear Supports
• Josephson-junction qubits with controlled couplings
• Quantum-state engineering with Josephson-junction devices

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