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Entanglement concentration for a non-maximally entangled four-photon cluster state |
Xiang Yan,Ya-Fei Yu,Zhi-Ming Zhang( ) |
| Laboratory of Nanophotonic Functional Materials and Devices (SIPSE), Laboratory of Quantum Engineering and Quantum Materials, South China Normal University, Guangzhou 510006, China |
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Abstract We present a scheme for locally concentrating a non-maximally entangled four-photon cluster state into a maximally-entangled four-photon cluster state. This scheme has a high success probability. The controlled-NOT (CNOT) gate is a crucial ingredient in this scheme, and we use a nearly deterministic CNOT gate, which is similar with that first introduced by Nemoto et al. (Phys. Rev. Lett., 2004, 93: 250502). This CNOT gate has a simple structure and does not need the strong nonlinearity.
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| Keywords
cluster state
entanglement concentration
controlled-NOT gate
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Corresponding Author(s):
Zhi-Ming Zhang
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Issue Date: 15 October 2014
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