a Laboratory of Quantum Communication and Quantum Computation, University of Science and Technology of China, Hefei 230026, China; b Department of Physics, Wenzhou Normal College, Wenzhou 325027, China; c Department of Physics, Weifang University, Weifang, China; d Department of Physics, Foshan University, Foshan 528000, China
Abstract We propose a scheme for the implementation of nonlocal quantum swap operation on two spatially separated entangled pairs and we show that the operation can swap two qubits of these entangled pairs. We discuss the resources of the entangled qubits and classical communication bits required for the optimal implementation of the nonlocal quantum swap operation. We also put forward a scheme for probabilistic implementation of nonlocal swap operation via a nonmaximally entangled quantum channel. The probability of a successful nonlocal swap operation is obtained by introducing a collective unitary transformation.
Received: 05 June 2001
Revised: 14 January 2002
Accepted manuscript online:
PACS:
03.67.Mn
(Entanglement measures, witnesses, and other characterizations)
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