Explicit Protocol for Deterministic Entanglement Concentration
GU Yong-Jian1, GAO Peng1, GUO Guang-Can2
1Department of Physics, Ocean University of China, Qingdao 266071
2Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026
Explicit Protocol for Deterministic Entanglement Concentration
GU Yong-Jian1;GAO Peng1;GUO Guang-Can2
1Department of Physics, Ocean University of China, Qingdao 266071
2Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026
Abstract： We present an explicit protocol for extraction of an EPR pair from two partially entangled pairs in a deterministic fashion via local operations and classical communication. This protocol is constituted by a local measurement described by a positive operator-valued measure (POVM), one-way classical communication, and a corresponding local unitary operation or a choice between the two pairs. We explicitly construct the required POVM by the analysis of the doubly stochastic matrix connecting the initial and the final states. Our scheme might be useful in future quantum communication.
2005, Vol. 22 
