Article,

Measuring the van der Waals forces between a Rydberg atom and a metallic surface

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Physical Review A, 37 (9): 3594--3597 (May 1988)
DOI: 10.1103/physreva.37.3594

Abstract

We have observed the deflection of Rydberg atoms towards a metallic surface by the van der Waals force. Cs and Na atoms in states of principal quantum number n were sent between two parallel gold-coated mirrors, spaced by a gap w (2.1 μm≤w≤8.5 μm). We measured the value nm at which the transmission cuts off and from the variation of nm versus w, we obtained a measure of the atom-surface interaction. For 12<n<30 this interaction is 3–4 orders of magnitude larger than for ground-state atoms, and it obeys the scaling laws of the Lennard-Jones model.

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