Quantum Jumps and Continuous Observations

S. Ia. Kilin

Hideo Mabuchi, P. Zoller

We formulate conditions for invertibility of quantum jumps in systems that decay by emission of quanta into a continuously monitored reservoir. We propose proof-of-principle experiments using techniques from cavity quantum electrodynamics and ion trapping, and briefly discuss the relevance of such methods for error correction in quantum computation.

Jürg Martin Fröhlich, Zhou Gang, Alessandro Pizzo

Rajamani Vijay, D. H. Slichter, Irfan A. Siddiqi

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.

Andres D. Cimmarusti, David G. Norris, Luis A. Orozco +2 more

Two-mode cavity QED allows the observation of ground-state quantum Zeeman beats with the conditional measurement of the intensity. Continuous π excitation produces quantum jumps that cause light shifts and induce decoherence.

Axel Schenzle