Observation of quantum oscillations between a Josephson phase qubit and a microscopic resonator using fast readout

Details Observation of quantum oscillations between a Josephson phase qubit and a microscopic resonator using fast readout Observation of quantum oscillations between a Josephson phase qubit and a microscopic resonator using fast readout

2004-05-31

arxiv.org/abs/cond-mat/0405710v1

Physics

Condensed Matter

Superconductivity

Scientific paper

10.1103/PhysRevLett.93.180401

We have detected coherent quantum oscillations between Josephson phase qubits and microscopic critical-current fluctuators by implementing a new state readout technique that is an order of magnitude faster than previous methods. The period of the oscillations is consistent with the spectroscopic splittings observed in the qubit's resonant frequency. The results point to a possible mechanism for decoherence and reduced measurement fidelity in superconducting qubits and demonstrate the means to measure two-qubit interactions in the time domain.

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