https://doi.org/10.1140/epjd/e2010-00054-3
Asymmetric five-party quantum state sharing of an arbitrary m-qubit state
1
NHPCC, Depart. of CS. & Tech., USTC, Hefei, 230027, P.R. China
2
School of Computer Science and Technology, Anhui University, Hefei, 230039, P.R. China
3
Suzhou Institute for Advanced Study, USTC, Suzhou, 215123, P.R. China
Corresponding author: hfsrh@sina.com
Received:
26
October
2009
Revised:
28
December
2009
Published online:
9
March
2010
We present an asymmetric scheme for five-party quantum state sharing of an arbitrary m-qubit state with the maximally entangled states of two-particle and three-particle. It involves two-particle Bell-basis or three-particle GHZ-basis measurements, rather than five-particle entanglements and five-particle joint measurements, which makes it more convenient in a practical application than some previous schemes. In addition, except that the designated recover of the quantum secret just keeps m particles, other agents only hold one particle in their hands respectively, and thus they only need perform a single-particle measurement on the respective particle with the basis X. Its intrinsic efficiency for qubits approaches 100%, and the total efficiency really approaches the maximal value.
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2010