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Controlling Excitation Inversion of a Cooper Pair Box Interacting with a Nanomechanical Resonator |
| C. Valverde1,2,3**, H. C. B. de Oliveira1, A. T. Avelar4, B. Baseia4 |
1Instituto de Química, Universidade de Brasília, 70919-970, Brasília, DF, Brazil
2Universidade Estadual de Goiás, Rod. BR 153, 75132-903 Anápolis, GO, Brazil
3Universidade Paulista, Rod. BR 153, km 7, 74845-090 Goiania, GO, Brazil
4Instituto de Física, Universidade Federal de Goiás, 74001-970 Goiania, GO, Brazil |
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Abstract We investigate the action of time-dependent detunings upon the excitation inversion of a Cooper pair box interacting with a nanomechanical resonator. The method employs the Jaynes–Cummings model with damping, assuming different decay rates of the Cooper pair box and various fixed and time-dependent detunings. It is shown that, when the presence of damping plus constant detunings destroys the collapse/revival effects, convenient choices of time-dependent detunings allow one to reconstruct such events in a perfect way. It is also shown that the mean excitation of the nanomechanical resonator is more robust against damping of the Cooper pair box for convenient values of time-dependent detunings.
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Received: 14 May 2012
Published: 31 July 2012
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| PACS: |
03.65.Yz
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(Decoherence; open systems; quantum statistical methods)
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85.35.Gv
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(Single electron devices)
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85.85.+j
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(Micro- and nano-electromechanical systems (MEMS/NEMS) and devices)
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