We study the dynamics of entanglement in a two-qubit system interacting with a squeezed thermal bath via a dissipative system-reservoir interaction with the system and reservoir assumed to be in a separable initial state. The resulting entanglement is studied by making use of concurrence as well as a recently introduced measure of mixed state entanglement via a probability density function which gives a statistical and geometrical characterization of entanglement by exploring the entanglement content in the various subspaces spanning the two-qubit Hilbert space. We also make an application of the two-qubit dissipative dynamics to a simplified model of quantum repeaters. © 2010 Elsevier Inc. All rights reserved.

Subhashish Banerjee

Department of Physics

IIT Jodhpur

V. Ravishankar

R. Srikanth

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Journal	Annals of Physics
ISSN	00034916