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Search Publications by: Raymond Simmonds (Fed)

Displaying 51 - 52 of 52

Decoherence in Josephson Qubits from Junction Resonances

August 13, 2004

Author(s)

Raymond Simmonds, Kristine Lang, Dustin Hite, David P. Pappas, John M. Martinis

We present experimental data that demonstrates a large reduction in the coherence of a Josephson phase qubit from spurious microwave resonances. These resonances are believed to arise from resonant fluctuators in the tunnel junction that couple to the

Fast, High-Fidelity, Quantum Non-demolition Readout of a Superconducting Qubit Using a Transverse Coupling

Author(s)

Raymond W. Simmonds, Jose A. Aumentado, Kurt Jacobs, Bryan Gard

While relatively easy to engineer, transverse coupling between a qubit and a cavity mode satisfies the criteria for a quantum non-demolition (QND) measurement only if the coupling between the qubit and cavity is much less than their mutual detuning. This

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