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Entanglement concentration protocols for quantum entangled states
Europhysics Letters, 2022Abstract Noise in the channel affects the security of cryptography protocols. The obvious solution for quantum protocols is to estimate the transformation of quantum states caused by the noise. Cluster states are the basic structures of quantum cryptography protocols, which are transmitted through the lossy quantum channel during the ...
Tingting Song, Ke-Jia Zhang, Hengyue Jia
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Entanglement Concentration is Irreversible
Physical Review Letters, 2013In quantum information theory, it is widely believed that entanglement concentration for bipartite pure states is asymptotically reversible. In order to examine this, we give a precise formulation of the problem, and show a trade-off relation between performance and reversibility, which implies the irreversibility of entanglement concentration.
Wataru, Kumagai, Masahito, Hayashi
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Practical Entanglement Concentration for Entangled Coherent States
International Journal of Theoretical Physics, 2014zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Sheng, Yu-Bo +4 more
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Entanglement Concentration of Entangled Coherent States
ACTA PHOTONICA SINICA, 2011With linear optical components to manipulate quantum states of optical fields,the quantum entanglement control and quantum communication can be implemented remotely.By analyzing optical splitter and its use of coherent states,it was found that when the initial state was a direct product of two partially entangled coherent states;another two modes would
蔡新华 CAI Xin-hua +2 more
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Entanglement Concentration of Entangled Squeezed Vacuum States
Chinese Physics Letters, 2002By analysing the action of a beamsplitter on squeezed vacuum states (SVSs), it is found that, if the two input light beams of the beamsplitter have the same squeezing amplitude and phase, the output state is a two-mode SVS. If the two input light beams of the beamsplitter have the same squeezing amplitude but a phase difference of π, the output state ...
Cai Xin-Hua, Kuang Le-Man
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Entanglement Concentration of Single-photon Entangled States
ACTA PHOTONICA SINICA, 2010By the analysis of the action characteristic of the beam-splitter,presenting a method of generating the single-photon entangled states utilizing optics beam-splitter and single-photon source.A scheme on entanglement concentration of the single-photon entanglement states is designed.In this scheme,the two single-photon partially entangled states are ...
蔡新华 CAI Xin-hua +2 more
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Deterministic multicopy entanglement concentration
EPL (Europhysics Letters), 2013The determinisitc entanglement concentration (DEC) protocol under local operations and classical communication (LOCC) for three-copy partially entangled states in bipartite systems is presented. The explicit elements of the operators used are calculated due to the general construction of the generalized measurement operator and the corresponding ...
Jie Zhao, Wendong Li, Yongjian Gu
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Entanglement concentration with nonidentical entanglement sources
Quantum Information ProcessingzbMATH Open Web Interface contents unavailable due to conflicting licenses.
Liu, A.-Peng +3 more
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