Quantifying, characterizing and controlling information flow in ultracold atomic gases
arXiv:1105.4790 · doi:10.1103/PhysRevA.84.031602
Abstract
We study quantum information flow in a model comprising of an impurity qubit immersed in a Bose-Einstein condensed reservoir. We demonstrate how information flux between the qubit and the condensate can be manipulated by engineering the ultracold reservoir within experimentally realistic limits. We place a particular emphasis on non-Markovian dynamics, characterized by a reversed flow of information from the background gas to the qubit and identify a controllable crossover between Markovian and non-Markovian dynamics in the parameter space of the model.
4 + little pages, 2 figures
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