Causality problems for Fermi's two atom system
Sep, 19934 pages
Published in:
- Phys.Rev.Lett. 72 (1994) 596-599
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Abstract: (APS)
Let A and B be two atoms or, more generally, a ‘‘source’’ and a ‘‘detector’’ separated by some distance R. At t=0A is in an excited state, B in its ground state, and no photons are present. A theorem is proved that in contrast to Einstein causality and finite signal velocity the excitation probability of B is nonzero immediately after t=0. Implications are discussed.References(23)
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