Acta Metallurgica Sinica(English letters) ›› 2013, Vol. 20 ›› Issue (6): 109-116.doi: 10.1016/S1005-8885(13)60116-8

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Optimizing scheme for probabilistic remote preparation of a two-qubit state

  

  1. School of Science, Xi’an University of Posts and Telecommunications, Xi’an 710061, China
  • Received:2013-06-09 Revised:2013-10-04 Online:2013-12-31 Published:2013-12-27
  • Contact: jiafan xia E-mail:xjfeng1989@126.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (10902083), and the Natural Science Foundation of Shaanxi Province of China (2013JM1009).

Abstract: Remote state preparation is increasingly becoming attractive in recent years, people have already started theoretical and experimental research, and have made valuable research results. Recently, a scheme for probabilistic remote preparation of a general two-qubit state was proposed (Wang Z Y in Quantum Inf Process. 11:1585, 2012)). In this paper, we present a modified scheme for probabilistic remote preparation of a general two-qubit state. To complete the scheme, the new and feasible complete orthogonal basis vectors have been introduced. Compared with the previous schemes, the advantage of our schemes is that the total success probability of remote state preparation will be greatly improved. The probability of success regarding this scheme is calculated in both general and particular cases. The results show that the success probability of remote state preparation can be improved a little. However, in certain special cases, the success probability of preparation can be greatly improved. In special cases, the success probability of preparation can be improved to 1. The security analysis of the scheme is provided in details.

Key words: remote state preparation, w-type state, orthogonal basis vector, success probability of preparation

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