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Phys Rev Lett. 2004 Oct 1;93(14):140404. Epub 2004 Sep 29.

Finite-time disentanglement via spontaneous emission.

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  • 1Rochester Theory Center for Optical Science and Engineering and the Department of Physics & Astronomy University of Rochester, Rochester, New York 14627, USA. ting@pas.rochester.edu

Abstract

We show that under the influence of pure vacuum noise two entangled qubits become completely disentangled in a finite-time, and in a specific example we find the time to be given by ln((2+sqrt[2] / 2) times the usual spontaneous lifetime.

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