Saving entanglement via a nonuniform sequence of pulses

Agarwal, G. S. (2010) Saving entanglement via a nonuniform sequence of pulses Physica Scripta, 82 (3). 038103_1-038103_5. ISSN 0031-8949

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We examine the question of survival of quantum entanglement between the bipartite states and multiparticle states like GHZ states under the action of a dephasing bath by the application of sequence of pi pulses. We show the great advantage of the pulse sequence of Uhrig 2007 it Phys. Rev. Lett. bf 98 100504 applied at irregular intervals of time, in controlling quantum entanglement. In particular death of entanglement could be considerably delayed by pulses. We use quantum optical techniques to obtain exact results.

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Source:Copyright of this article belongs to Royal Swedish Academy of Sciences.
ID Code:90347
Deposited On:09 May 2012 03:57
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