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arXiv 1111.5910quant-ph
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在克隆量子系统的联合测量中如何出现弱值

How weak values emerge in joint measurements on cloned quantum systems

Holger F. Hofmann

摘要:

对最优普适克隆的统计分析表明,有可能确定一个理想的(但非正的)复制过程,将原始希尔伯特空间的所有属性忠实地映射到两个独立的量子系统上。然后,在单独克隆上的非交换测量的联合概率对应于在单个系统上的弱测量中观察到的复联合概率的实部,其中在两个克隆上的测量替换了弱测量和后选择的相应序列。通过用部分交换操作代替克隆过程,可以得到弱测量静校正量的虚部。受控交换操作结合了这两个过程,使得完整的弱测量统计可以作为两个输出系统上完全解析的投影测量的联合概率的定义明确的贡献。

英文摘要:

A statistical analysis of optimal universal cloning shows that it is possible to identify an ideal (but non-positive) copying process that faithfully maps all properties of the original Hilbert space onto two separate quantum systems. The joint probabilities for non-commuting measurements on separate clones then correspond to the real parts of the complex joint probabilities observed in weak measurements on a single system, where the measurements on the two clones replace the corresponding sequence of weak measurement and post-selection. The imaginary parts of weak measurement statics can be obtained by replacing the cloning process with a partial swap operation. A controlled-swap operation combines both processes, making the complete weak measurement statistics accessible as a well-defined contribution to the joint probabilities of fully resolved projective measurements on the two output systems.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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