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Time after time: From EPR to Wigner's friend and quantum eraser
Marlan O. Scully, Daniel M. Greenberger, Wolfgang P. Schleich
119 - 132
10.3254/978-1-61499-937-9-119
Proceedings of the International School of Physics "Enrico Fermi"
Volume 197: Foundations of Quantum Theory
Abstract

The famous Einstein-Podolsky-Rosen (EPR) “paradox” is a good example of how “before” and “after” arguments can be misleading. Wigner's friend is an even better case asking questions such as: when and how does the observer change or “reduce” the state vector? Perhaps the best and most insightful Lehrbeispiel of how to think about before and after issues comes from the quantum eraser. In this case Baysian logic helps clear up before and after confusion via detailed, but simple, calculations.

$35.00 / €27.50 / £22.00
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