J4 ›› 2015, Vol. 32 ›› Issue (4): 472-477.

• Quantum Optics • Previous Articles     Next Articles

Scheme of N-qubit secret sharing based on four-particle cluster state

Wu Junqin, Lin Huiying   

  1. School of Information Engineering,Jiangxi University of Science and Technology ,Ganzhou 341000, China
  • Received:2014-09-05 Revised:2014-10-20 Published:2015-07-28 Online:2015-08-04

Abstract:

The four-particle cluster state as the quantum channel was proposed to achieve the N-qubit secret sharing, the cluster state is non-maximally entangled state,but it is stronger than the maximally entangled state, the correspondents Alice adds auxiliary particle, measuring the five particles with joint measurement,Bob(Charlie)using the single particle on the received particles,and send the results and corresponding operation of recovering quantum state to the Charlie(Bob),according to the information from Bob(Charlie),some corresponding operation on the particles was made by Charlie(Bob),making the quantum states with the quantum circuit according to the need of sharing states. The security of the scheme is demonstrated.

Key words: quantum optics, secret sharing, cluster state, entangled state, joint measurement, unitary transformation, quantum circuit