In a recent paper N. Ba An (Phys. Rev. A 68, 022321 (2003)) proposed a scheme to teleport a single particle state, which is superposition of coherent states |α〉 and |-α〉 using a 4-partite state, a beam splitter, and phase shifters and concluded that the probability for successful teleportation is only 1/4 in the limit |α| → 0 and 1/2 in the limit |α| → ∞. In this paper, we modify this scheme and find that an almost perfect success can be achieved if |α|~2 is appreciable. For example, for |α|~2 = 5, the minimum of average fidelity for teleportation, which is the minimum of sum of the product of probability for occurrence of any case and the corresponding fidelity evaluated for an arbitrary chosen information state, is 0.9999.
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机译：在最近的一篇论文中，N。Ba An（Phys。Rev. A 68，022321（2003））提出了一种传送单个粒子态的方案，该态是使用4部分粒子相干态|α>和|-α>的叠加状态，分束器和移相器，得出结论，在极限|α|中成功传送的概率仅为1/4。 →0和1/2的极限|α| →∞。在本文中，我们修改了该方案，发现如果|α|〜2是可观的，则可以实现几乎完美的成功。例如，对于|α|〜2 = 5，进行隐形传态的平均保真度的最小值是0.9999，这是任何情况下发生概率与任意选择的信息状态所评估的相应保真度的乘积之和的最小值。 。
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