Dispersive atom interferometry phase shifts due to atom-surface interactions

S. Lepoutre, H. Jelassi, V. P.A. Lonij, G. Trénec, M. Büchner, A. D. Cronin, J. Vigué

Research output: Contribution to journalArticlepeer-review

16 Scopus citations


We used the Toulouse atom interferometer to study how Van der Waals (VdW) interactions between atoms and surfaces cause velocity-dependent phase shifts for atomic de Broglie waves. By introducing a thin nano-grating in one branch of this interferometer, we observed a phase shift that depends on velocity to the power -0.49. This dispersion serves to measure both the strength and the position dependence of the atom-surface potential in the range from 5 to 10 nm from the surface, and it can also set new limits on non-Newtonian gravity in the 2 nm range.

Original languageEnglish (US)
Article number20002
JournalEurophysics Letters
Issue number2
StatePublished - Oct 2009
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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