Quantifying, characterizing and controlling information flow in   ultracold atomic gases
  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. 
Pinja Haikka, Suzanne McEndoo, Gabriele de Chiara, Massimo Palma and   Sabrina Maniscalco
quant-ph cond-mat.quant-gas