Quantum control by compensation of quantum fluctuations
Holger Friedrich Hofmann, Ortwin G. Hess, Günter Mahler · Optics Express · 1998
We show that the influence of quantum fluctuations in the electromagnetic field vacuum on a two level atom can be measured and consequently compensated by balanced homodyne detection and a coherent feedback field. This compensation suppresses the decoherence associated with spontaneous emissions for a specific state of the atomic system allowing complete control of the coherent state of the system.