Physics – Condensed Matter – Superconductivity
Scientific paper
2008-05-28
Physics
Condensed Matter
Superconductivity
10 pages, 3 figures
Scientific paper
10.1103/PhysRevB.77.214520
We calculate the dynamics of a nanomechanical oscillator (NMO) coupled capacitively to a Cooper pair box (CPB), by solving a stochastic Schrodinger equation with two Lindblad operators. Both the NMO and the CPB are assumed dissipative, and the coupling is treated within the rotating wave approximation. We show numerically that, if the CPB decay time is smaller than the NMO decay time, the coupled NMO will lose energy faster, and the coupled CPB more slowly, than do the uncoupled NMO and CPB. The results show that the efficiency of energy loss by an NMO can be substantially increased if the NMO is coupled to a CPB.
Stroud David
Tiwari Rakesh P.
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