For a superconducting qubit driven to perform Rabi oscillations and coupled to a slow electromagnetic or nano-mechanical oscillator we describe previously unexplored quantum optics effects. When the Rabi frequency is tuned to resonance with the oscillator the latter can be driven far from equilibrium. Blue detuned driving leads to a population inversion in the qubit and a bi-stability with lasing behavior of the oscillator; for red detuning the qubit cools the oscillator. This behavior persists at the symmetry point where the qubit-oscillator coupling is quadratic and decoherence effects are minimized. There the system realizes a "single-atom-two-photon laser".
Cite
@article{arxiv.cond-mat/0701041,
title = {Single-qubit lasing and cooling at the Rabi frequency},
author = {Julian Hauss and Arkady Fedorov and Carsten Hutter and Alexander Shnirman and Gerd Schön},
journal= {arXiv preprint arXiv:cond-mat/0701041},
year = {2008}
}
Comments
Replaced with final published version, fig. 2 compressed