Eur. Phys. J. D 48, 279-284 (2008)
https://doi.org/10.1140/epjd/e2008-00075-5

Efficient and economic five-party quantum state sharing of an arbitrary m-qubit state

¹ The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing, 100875, P.R. China
² Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, 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

Corresponding author: ^a fgdeng@bnu.edu.cn

Received: 22 October 2007
Revised: 18 March 2008
Published online: 18 April 2008

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.