| 量子信息的几率删除 |
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| 引用本文： | 张鸿涛,曾谨言.量子信息的几率删除[J].北京大学学报(自然科学版),2003,39(1):91-97. |
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| 作者姓名： | 张鸿涛 曾谨言 |
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| 作者单位： | 北京大学物理系，北京，100871 |
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| 基金项目： | 国家自然科学基金;10047001; |
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| 摘 要： | 通过一个幺正变换U和一个测量过程M，对于从一个量子态集合{|ψ1〉, |ψ2〉}中随机选出的两个非正交态，实现几率删除的方案。比较了量子删除和量子克隆物理过程的差异及其效率。
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| 关 键 词： | 量子不可克隆定理 量子不可删除定理 几率删除 |
| 收稿时间： | 2002-04-09 |
Probabilistic Erasing of Quantum Information |
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| ZHANG Hongtao,ZENG Jinyan.Probabilistic Erasing of Quantum Information[J].Acta Scientiarum Naturalium Universitatis Pekinensis,2003,39(1):91-97. |
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| Authors: | ZHANG Hongtao ZENG Jinyan |
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| Institution: | Department of Physics, Peking University, Beijing, 100871 |
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| Abstract: | According to the superposition principle of quantum states, an arbitrary quantum states can not be deterministically erased(Pati & Braunstein), but may be probabilistically erased. Similar to the probabilistic cloning of quantum states by Duan & Guo, in this paper a probabilistic erasing scheme is developed, i.e., two non-orthogonal states secretly chosen from a certain set {|ψ1〉, ψ2〉} can be probabilistically erased through a unitary transformation U in combination with a subsequent measurement M. The differences in characters and efficiencies between probabilistic cloning and erasing are discussed. |
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| Keywords: | quantum non-cloning theorem quantum non-erasing theorem probabilistic erasing |
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