Time after time: From EPR to Wigner's friend and quantum eraser Conference Paper uri icon


  • Societ Italiana di Fisica. The famous Einstein-Podolsky-Rosen (EPR) paradox is a good example of how before and after arguments can be misleading. Wigners 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.

published proceedings


author list (cited authors)

  • Scully, M. O., Greenberger, D. M., & Schleich, W. P.

publication date

  • January 1, 2019 11:11 AM