Observation of Quantum Jumps in a Superconducting Artificial Atom
Abstract
We continuously measure the state of a superconducting quantum bit coupled to a microwave readout cavity by using a fast, ultralow-noise parametric amplifier. This arrangement allows us to observe quantum jumps between the qubit states in real time, and should enable quantum error correction and feedback—essential components of quantum information processing.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2011
- DOI:
- arXiv:
- arXiv:1009.2969
- Bibcode:
- 2011PhRvL.106k0502V
- Keywords:
-
- 03.67.Lx;
- 42.50.Lc;
- 42.50.Pq;
- 85.25.-j;
- Quantum computation;
- Quantum fluctuations quantum noise and quantum jumps;
- Cavity quantum electrodynamics;
- micromasers;
- Superconducting devices;
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Superconductivity;
- Quantum Physics
- E-Print:
- Updated draft including supplementary information. 8 pages, 6 figures. Supplementary videos are available on our website at http://physics.berkeley.edu/research/siddiqi/docs/supps/