Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Observation of Quantum Oscillations between a Josephson Phase Qubit and a Microscopic Resonator using Fast Readout

Published

Author(s)

Ken Cooper, Matthias Steffen, Robert McDermott, Raymond W. Simmonds, Seongshik Oh, Dustin A. Hite, David P. Pappas, John M. Martinis

Abstract

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 they demonstrate the means to measure two-qubit interactions in the time domain.
Citation
Physical Review Letters
Volume
93
Issue
18

Keywords

coherent oscillation, fast readout, Josephson junction, phase qubit, quantum computing, qubit, superconductivity
Created October 25, 2004, Updated February 17, 2017