Coulomb blockade for an oscillating tunnel junction
arXiv:0806.0547 · doi:10.1103/PhysRevB.77.235318
Abstract
We consider a tunnel junction formed between a fixed electrode and an oscillating one. Accumulation of the charge on the junction capacitor induces a force on the nano-mechanical oscillator. The junction is voltage biased and connected in series with an impedance . We discuss how the picture of Coulomb blockade is modified by the presence of the oscillator. Quantum fluctuations of the mechanical oscillator modify the - characteristics particularly in the strong Coulomb blockade limit. We show that the oscillator can be taken into account by a simple modification of the effective impedance of the circuit. We discuss in some details the case of a single inductance and of a constant resistance . With little modifications the theory applies also to incoherent transport in Josephson junctions in the tunneling limit.
9 pages
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