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Efficient and economic five-party quantum state sharing of an arbitrary m-qubit state |
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| Authors: | Y. B. Sheng F. G. Deng |
| Affiliation: | (1) The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing, 100875, P.R. China;(2) and Department of Material Science and Engineering, Beijing Normal University, Institute of Low Energy Nuclear Physics, Beijing, 100875, P.R. China;(3) Beijing Radiation Center, Beijing, 100875, P.R. China;(4) Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing, 100875, P.R. China |
| Abstract: | We present an efficient and economic scheme for five-party quantum state sharing of an arbitrary m-qubit state with 2m three-particle Greenberger-Horne-Zeilinger (GHZ) states and three-particle GHZ-state measurements. It is more convenient than other schemes as it only resorts to three-particle GHZ states and three-particle joint measurement, not five-particle entanglements and five-particle joint measurements. Moreover, this symmetric scheme is in principle secure even though the number of the dishonest agents is more than one. Its total efficiency approaches the maximal value. |
| Keywords: | KeywordHeading" >PACS. 03.67.Hk Quantum communication 03.67.Dd Quantum cryptography |
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