Sumanta Das and G S Agarwal 2009 J. Phys. B: At. Mol. Opt. Phys. 42 141003 doi:10.1088/0953-4075/42/14/141003
Sumanta Das and G S Agarwal
Show affiliationsInteraction among qubits is the basis to many quantum logic operations. We report how such inter-qubit interactions can lead to new features, in the form of bright and dark periods in the entanglement dynamics of two qubits subject to environmental perturbations. These features are seen to be precursors to the well-known phenomenon of sudden death of entanglement (Yu and Eberly 2004 Phys. Rev. Lett. 93 140404 ) for noninteracting qubits. Further, we find that the generation of bright and dark periods is generic and occurs for wide varieties of environment models. We present explicit results for two popular models.
03.67.Lx Quantum computation architectures and implementations
03.67.Mn Entanglement measures, witnesses, and other characterizations
Issue 14 (28 July 2009)
Received 24 April 2009, in final form 10 June 2009
Published 24 June 2009
Sumanta Das and G S Agarwal 2009 J. Phys. B: At. Mol. Opt. Phys. 42 141003
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