On The Significance of Which-Way Expositions: Propounding a New Possibility

Details On The Significance of Which-Way Expositions: Propounding a New Possibility On The Significance of Which-Way Expositions: Propounding a New Possibility

2007-02-10

arxiv.org/abs/quant-ph/0702099v2

Physics

Quantum Physics

21 pages, 4 figures, this is the second version which includes many amendments in exploring the issue

Scientific paper

In this article, we survey some controversial problems concerning the idea of erasing Which Way information proposed in recent years. A statistical examination of these proposals suggests that whenever the Bayesian rule is taken into account for two relevant events in two successive times, the probabilistic description of them is unavoidably time-symmetric. Consequently, it seems that they cannot fulfill the implications of a so-called delayed-choice experiment. As a possible alternative, however, we suggest a new experimental arrangement in which one can change the whole state of a given system at a proper time (without measurement) to accomplish an actual delayed-choice experiment with a time-asymmetric attribute. The peculiar features of this experiment are then discussed.

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