Quantum feedback control of a solid-state two-level system
arXiv:cond-mat/0107280
Abstract
We have studied theoretically the basic operation of a quantum feedback loop designed to maintain the desired phase of quantum coherent oscillations in a two-level system. Such feedback can suppress the dephasing of oscillations due to interaction with environment. Prospective experiments can be realized using metallic single-electron devices or GaAs technology.
4 pages, 4 figures