Efficient Multiparty Quantum Secret Sharing with Greenberger--Horne--Zeilinger States
DENG Fu-Guo1,2,3, ZHOU Ping1,2, LI Xi-Han1,2, LI Chun-Yan1,2, ZHOU Hong-Yu1,2,3
1The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
2Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875
1Beijing Radiation Center, Beijing 100875
Efficient Multiparty Quantum Secret Sharing with Greenberger--Horne--Zeilinger States
DENG Fu-Guo1,2,3;ZHOU Ping1,2;LI Xi-Han1,2;LI Chun-Yan1,2;ZHOU Hong-Yu1,2,3
1The Key Laboratory of Beam Technology and Material Modification of Ministry of Education, Beijing Normal University, Beijing 100875
2Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875
1Beijing Radiation Center, Beijing 100875
Abstract： An efficient multiparty quantum secret sharing scheme is proposed with Greenberger--Horne--Zeilinger (GHZ) states following some ideas in quantum dense coding. The agents take the single-photon measurements on the photons received for eavesdropping check and exploit the four local unitary operations I, σz, σx and iσy to code their message. This scheme has the advantage of high capacity as each GHZ state can carry two bits of information. The parties do not need to announce the measuring bases for almost all the photons, which will reduce the classical information exchanged largely. The intrinsic efficiency for qubits and the total efficiency both approach the maximal values.
2006, Vol. 23 
