Abstract
We consider a two-level quantum system (qubit) that is continuously measured by a detector. The information provided by the detector is taken into account to describe the evolution during a particular realization of the measurement process. We discuss the Bayesian formalism for such “selective” evolution of an individual qubit and apply it to several solid-state setups. In particular, we show how to suppress qubit decoherence using continuous measurement and a feedback loop.
- Received 17 September 2000
DOI:https://doi.org/10.1103/PhysRevB.63.115403
©2001 American Physical Society