We analyze the behavior of systems of two and three qubits made by Josephson junctions, treated in the two level approximation, driven by a radiation mode in a cavity. The regime we consider is a strong coupling one recently experimentally reached for a single junction. Rabi oscillations are obtained with the frequency proportional to integer order Bessel functions in the limit of a large photon number, similarly to the case of the single qubit. A selection rule is derived for the appearance of Rabi oscillations. A quantum amplifier built with a large number of Josephson junctions in a cavity in the strong coupling regime is also described.
@article{arxiv.cond-mat/0411171,
title = {Cooperative effects in Josephson junctions in a cavity in the strong coupling regime},
author = {Marco Frasca},
journal= {arXiv preprint arXiv:cond-mat/0411171},
year = {2007}
}
Comments
9 pages, no figures. Version accepted for publication in Physical Review B