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Published on: November 11, 2013
Onset of Casimir-Polder retardation in a long-range molecular quantum state
Michał Przybytek1, Bogumił Jeziorski, Wojciech Cencek
1Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland.
Abstract:
Two 4He atoms form a diatomic molecule with a significant vibrational wave function amplitude at interatomic separations R>100 Å, where the retardation switches the London R(-6) decay of the potential to the Casimir-Polder R(-7) form. It has been assumed that this effect of retardation on the long-range part of the potential is responsible for the 2 Å (4%) increase of the bond length
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