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American Physical Society, Physical Review A, 4(72), 2005

DOI: 10.1103/physreva.72.044301

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Multiparty quantum state sharing of an arbitrary two-particle state with Einstein-Podolsky-Rosen pairs

Journal article published in 2005 by Fu-Guo Deng ORCID, Xi-Han Li, Chun-Yan Li, Ping Zhou, Hong-Yu Zhou
This paper is available in a repository.
This paper is available in a repository.

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Abstract

A scheme for multiparty quantum state sharing of an arbitrary two-particle state is presented with Einstein-Podolsky-Rosen pairs. Any one of the $N$ agents has the access to regenerate the original state with two local unitary operations if he collaborates with the other agents, say the controllers. Moreover, each of the controllers is required to take only a product measurement $σ_x ⊗ σ_x$ on his two particles, which makes this scheme more convenient for the agents in the applications on a network than others. As all the quantum source can be used to carry the useful information, the intrinsic efficiency of qubits approaches the maximal value. With a new notation for the multipartite entanglement, the sender need only publish two bits of classical information for each measurement, which reduces the information exchanged largely. ; Comment: 5 pages, 1 figure; The revised version published