Journal
QUANTUM INFORMATION PROCESSING
Volume 13, Issue 9, Pages 1967-1978Publisher
SPRINGER
DOI: 10.1007/s11128-014-0789-8
Keywords
Hyperentanglement; Entanglement concentration; Multi-photon W state; Linear optical element
Funding
- National Natural Science Foundation of China [11105030, 11374054]
- Major State Basic Research Development Program of China [2012CB921601]
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We present an efficient protocol to concentrate arbitrary less-hyperentangled multi-photon W states to the maximally hyperentangled multi-photon W state with parameter-splitting method and linear optics elements. Compared with previous entanglement concentration works, the present protocol does not need two copies of partially entangled states or the ancillary single photon. Moreover, we discuss the feasibility of the setups of the protocol, concluding that the present protocol is feasible with the current technology. Thus, the protocol may be more meaningful in practical quantum information applications.
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