Controlled teleportation against uncooperation of part of supervisors

  • Authors:

  • Xin-Wen Wang;Yu-Huan Su;Guo-Jian Yang

  • Affiliations:

  • Department of Physics, Beijing Normal University, Beijing, China 100875 and Applied Optics Beijing Area Major Laboratory, Beijing, China 100875;Department of Physics, Beijing Normal University, Beijing, China 100875 and Applied Optics Beijing Area Major Laboratory, Beijing, China 100875;Department of Physics, Beijing Normal University, Beijing, China 100875 and Applied Optics Beijing Area Major Laboratory, Beijing, China 100875

  • Venue:
  • Quantum Information Processing
  • Year:
  • 2009

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Abstract

We study the teleportation of an unknown quantum state from a sender (Alice) to a receiver (Bob) via the control of many supervisors (Charlie 1, Charlie 2, . . .) in a network. It has been shown that such a task can be achieved by distributing a GHZ-type entangled state among the participants in advance. In the protocols with GHZ-type entanglement channel, the achievement of teleportation between Alice and Bob is conditioned on the cooperation of all the supervisors. In other words, if anyone of the supervisors does not cooperate, the teleportation will fails. In this paper, we introduce another kind of controlled teleportaton protocol with other types of entangled states acting as the quantum channel, in which the teleportation between Alice and Bob can be realized with high degree of endurance against uncooperation of part of supervisors.