CAUSALITY, MEMORY ERASING AND DELAYED CHOICE EXPERIMENTS
Y. Aharonov, S. Popsecu, L. Vaidman
Abstract
Comment on [R.L. Ingraham, Phys. Rev. A 50, 4502 (1994)]. Ingraham suggested ``a delayed-choice experiment with partial, controllable memory erasing''. It is shown that he cannot be right since his predictions contradict relativistic causality. A subtle quantum effect which was overlooked by Ingraham is explained.
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