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Nature Physics 5, 91 - 92 (2009)
doi:10.1038/nphys1193

Subject Categories: Atomic and molecular physics | Quantum physics

Rydberg atoms: There can be only one

Matthias Weidemüller1

  1. Matthias Weidemüller is at the Physics Institute, Ruprecht-Karl University Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany.
    e-mail: weidemueller@physi.uni-heidelberg.de


In an ensemble of atoms with long-range dipolar interactions between them, only one atom can be excited at a time. This 'dipole blockade' has now been observed for two single atoms positioned at macroscopic distances.

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