Protecting Bi-Partite Entanglement by Quantum Interferences

Details Protecting Bi-Partite Entanglement by Quantum Interferences Protecting Bi-Partite Entanglement by Quantum Interferences

2010-04-05

arxiv.org/abs/1004.0564v1

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

We show that vacuum induced coherence in three level atomic systems can lead to preservation of bi-partite entanglement, when two such atoms are prepared as two initially entangled qubits each independently interacting with their respective vacuum reservoirs. We explicitly calculate the time evolution of concurrence for two different Bell states and show that a large amount of entanglement can survive in the long time limit. The amount of entanglement left among the two qubits depends strongly on the ratio of the non- orthogonal transitions in each qubit and can be more than 50%

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