Journal
PHYSICAL REVIEW A
Volume 86, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.86.022511
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Funding
- European Research Council (Socathes)
- Deutsche Forschungsgemeinschaft [SFB TRR21]
- Evangelisches Studienwerk Villigst e.V.
- Baden-Wurttemberg-Stiftung through the Kompetenznetz Funktionelle Nanostrukturen
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We observe the shift of Rydberg levels of rubidium close to a copper surface when atomic clouds are repeatedly deposited on it. We measure transition frequencies of rubidium to S and D Rydberg states with principal quantum numbers n between 31 and 48 using the technique of electromagnetically induced transparency. The spectroscopic measurement shows a strong increase of electric fields towards the surface that evolves with the deposition of atoms. Starting with a clean surface, we measure the evolution of electrostatic fields in the range between 30 and 300 mu m from the surface. We find that after the deposition of a few hundred atomic clouds, each containing similar to 10(6) atoms, the field of adsorbates reaches 1 V/cm for a distance of 30 mu m from the surface. This evolution of the electrostatic field sets serious limitations on cavity QED experiments proposed for Rydberg atoms on atom chips.
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