摘要
The probabilistic quantum teleportation scheme [Phys. Lett. A 305 （2002） 12] is improved via two seemingly different methods （i.e., the usual aneilla method and the so-called Kraus method）, respectively. The essence of the improvements is to fetch a part from the residues so that the success probability is accordingly increased. The two improved versions and a similar protocol proposed by Li et al. [Phys. Rev. A 61 （2000） 034301] are compared mutually and discussed. It is found that they are equally efficient and can reach the success probability threshold determined by the inherent entanglement of the quantum channel.
基金
Supported by the Program for New Century Excellent Talents at the University of China under Grant No.NCET-06-0554
the National Natural Science Foundation of China under Grant Nos.10975001,60677001,10747146,and 10874122
the Science-Technology Fund of Anhui Province for Outstanding Youth under Grant No.06042087
the General Fund of the Educational Committee of Anhui Province under Grant No.2006KJ260B
the Natural Science Foundation of Guangdong Province under Grant Nos.06300345 and 7007806
the Talent Foundation of High Education of Anhui Province for Outstanding Youth under Grant No.2009SQRZ018
