Browsing by Author "Retamal, J. C."

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    Entangled coherent states under dissipation
    (2010) Lastra, F.; Romero, G.; Lopez, C. E.; Zagury, N.; Retamal, J. C.
    We study the evolution of entangled coherent states of the two quantized electromagnetic fields under dissipation. Characteristic time scales for the decay of the negativity are found in the case of large values of the phase space distance among the states of each mode. We also study how the entanglement emerges among the reservoirs. (C) 2010 Elsevier B.V. All rights reserved.
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    Sudden birth versus sudden death of entanglement in multipartite systems
    (2008) Lopez, C. E.; Romero, G.; Lastra, F.; Solano, E.; Retamal, J. C.
    We study the entanglement dynamics of two cavities interacting with independent reservoirs. Expectedly, as the cavity entanglement is depleted, it is transferred to the reservoir degrees of freedom. We find also that when the cavity entanglement suddenly disappears, the reservoir entanglement suddenly and necessarily appears. Surprisingly, we show that this entanglement sudden birth can manifest before, simultaneously, or even after entanglement sudden death. Finally, we present an explanatory study of other entanglement partitions and of higher dimensional systems.