ua nt - p h / 95 01 00 6 v 1 8 J an 1 99 5 Causality , Memory Erasing and Delayed Choice Experiments

نویسندگان

  • Y. Aharonov
  • S. Popescu
  • L. Vaidman
چکیده

Recently, Ingraham [1] suggested " a delayed-choice experiment with partial , controllable memory erasing ". We shall show that he cannot be right since his predictions contradict relativistic causality. We shall explain a subtle quantum effect which was overlooked by Ingraham. Let us first sketch Ingraham's argument. He considered two atoms located close to each other. The atoms have four relevant levels: the ground state |c and three excited levels, |a, |b, |b ′. The first laser pulse puts the atoms into the superposition 1 √ 2 (|a 1 c 2 + |c 1 a 2). The atom in the state |a immediately 1

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تاریخ انتشار 1995