We present the realization of a cavity quantum electrodynamics setup in which photons of strongly different lifetimes are engineered in different harmonic modes of the same cavity. We achieve this in a superconducting transmission line resonator with superconducting qubits coupled to the different modes. One cavity mode is strongly coupled to a detection line for qubit state readout, while a second long lifetime mode is used for photon storage and coherent quantum operations. We demonstrate sideband based measurement of photon coherence, generation of n photon Fock states and the scaling of the sideband Rabi frequency with the square root of n using a scheme that may be extended to realize sideband based two-qubit logic gates.
@article{arxiv.0911.4951,
title = {Cavity QED with separate photon storage and qubit readout modes},
author = {P. J. Leek and M. Baur and J. M. Fink and R. Bianchetti and L. Steffen and S. Filipp and A. Wallraff},
journal= {arXiv preprint arXiv:0911.4951},
year = {2010}
}
Comments
4 pages, 5 figures, version with high resolution figures available at http://qudev.ethz.ch/content/science/PubsPapers.html