Acta Metallurgica Sinica(English letters) ›› 2015, Vol. 22 ›› Issue (6): 45-50.doi: 10.1016/S1005-8885(15)60692-6

• Security • Previous Articles     Next Articles

Perfect quantum controlled teleportation via a novel three-particle partially entangled channel

Chen Na, Quan Dongxiao, Yang Hong, Pei Changxing   

  1. State Key Laboratory of Integrated Services Networks, Xidian University, Xi’an 710071, China
  • Received:2015-05-13 Revised:2015-10-08 Online:2015-12-31 Published:2015-12-30
  • Contact: Na CHEN
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (61372076, 61301171), the 111 Project (B08038), and the Fundamental Research Funds for the Central Universities (K5051201021).

Abstract: Recently Li et al. proposed special partially entangled states serving as quantum channel in quantum controlled teleportation, while there are some limitations in their scheme. Based on that, we present a possible improvement in this paper. We construct a novel three-particle partially entangled state which is suitable for perfect controlled teleportation. A simple quantum circuit is designed to obtain this state. We evaluate quantum controlled teleportation from three points of view: teleportation fidelity, success probability and the controller’s power. Detailed calculations and simulation analyses show that the constructed state is a suitable channel for controlled teleportation of arbitrary qubits, unit teleportation fidelity and 100% success probability can be achieved. Meanwhile, as long as channel’s entanglement degree equals to or greater than 3/4, the controller’s power can be guaranteed.

Key words: quantum controlled teleportation, three-particle partially entangled state, quantum circuit