Suzanne McEndoo, Pinja Haikka, Gabriele de Chiara, Massimo Palma, Sabrina Maniscalco
We study the entanglement of two impurity qubits immersed in a Bose-Einstein condensate reservoir. We calculate the reduced dynamics of the impurities for a broad class of initial states, namely the Werner states, and analyze the time evolution of entanglement and other quantum correlations. We calculate a phase diagram for the residual entanglement for long times. For certain initial product states we find that the condensate generates entanglement between the impurities, thus acting as an interaction mediator.
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http://arxiv.org/abs/1206.1224
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