Physics – Quantum Physics
Scientific paper
2003-07-17
Physica A Volume: 337, Issue: 1-2, June 1, 2004, pp. 141-148
Physics
Quantum Physics
11 pages
Scientific paper
10.1016/j.physa.2004.02.016
In this paper, we first propose a general entanglement distillation protocol for three-particle W class state, which can concentrate the state (non-maximally entangled W state). The general protocol is mainly based on the unitary transformations on the auxiliary particles and the entangled particles, and a feasible physical scheme is suggested based on the cavity QED techniques. The protocol and scheme can be extended to the entanglement concentration of N-particle case.
Cao Zhuo-Liang
Yang Ming
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