Observation of Quantum Jumps in a Superconducting Artificial Atom
Rajamani Vijay, D. H. Slichter, Irfan A. Siddiqi · Physical Review Letters · 2011
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.