English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Four atom optics experiments that each serve to measure atom-surfaceinteractions near nanofabricated gratings are presented here. In theseexperiments atoms in a beam travel within 25 nm of a material grating bar, andthe analysis incorporates phase shifts for the atomic de Broglie waves due tointeractions betwen Na atoms and silicon nitride surfaces. One atom diffractionexperiment determines the van der Waals coefficient $C_3=2.7\pm$0.8 meVnm$^3$,and one atom interferometer experiment determines $C_3=4\pm$1 meVnm$^3$. Theresults of all four experiments are consistent with the Lifshitz predictionthat is explicitly calculated here for Na-silicon nitride to be $C_3=3.25$meVnm$^3$. The four atom optics experiments and review of van der Waals theoryare complemented by similar experiments using electron beams and analysis ofimage-charge effects.Comment: 8 pages, 16 figures, submitted to Journal of Physics: Conference  Proceedings, Conference on Atoms and Molecules near Surface

de Broglie wave phase shifts induced by surfaces closer than 25 nm