Cavity QED with separate photon storage and qubit readout modes

Details Cavity QED with separate photon storage and qubit readout modes Cavity QED with separate photon storage and qubit readout modes

2009-11-25

arxiv.org/abs/0911.4951v2

Phys.Rev.Lett.104:100504,2010

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 5 figures, version with high resolution figures available at http://qudev.ethz.ch/content/science/PubsPapers.html

Scientific paper

10.1103/PhysRevLett.104.100504

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.

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