量子力学的两态矢量形式：一个新的评述
The Two-State Vector Formalism of Qauntum Mechanics: an Updated Review
摘要：
本文给出了量子力学的两态矢量形式。它是标准量子理论的时间对称化方法，特别有助于分析在预先和之后选择的系综上进行的实验。在这种方法中自然产生的几个奇特的效果被认为是。特别是，“弱测量”（标准测量与相互作用减弱）的概念进行了深入讨论，揭示了一个非常不寻常的，但一致的图片。此外，一个gedanken实验的设计，实现了一种量子“时间机器”的描述。在两态矢量形式主义的背景下，时间对称性的问题得到澄清。
英文摘要：
In this paper we present the two-state vector formalism of quantum mechanics. It is a time-symmetrized approach to standard quantum theory particularly helpful for the analysis of experiments performed on pre- and post-selected ensembles. Several peculiar effects which naturally arise in this approach are considered. In particular, the concept of ``weak measurements'' (standard measurements with weakening of the interaction) is discussed in depth revealing a very unusual but consistent picture. Also, a design of a gedanken experiment which implements a kind of quantum ``time machine'' is described. The issue of time-symmetry in the context of the two-state vector formalism is clarified.
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