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Phys Rev Lett. 2013 Oct 25;111(17):173001. Epub 2013 Oct 22.

Microwave transitions in pairs of Rb Rydberg atoms.

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Department of Physics, University of Virginia, Charlottesville, Virginia 22904-0714, USA.


We have observed microwave transitions between pairs of cold Rb atoms, specifically, transitions between the molecular nd(5/2)nd(5/2) and (n+1)d(j)(n-2)f states for 41≤n≤44. (We use the separated atom limits as labels.) The transition is allowed because the dipole-dipole induced configuration interaction between the nd(5/2)nd(5/2) state and the energetically close (n+2)p(3/2)(n-2)f state leads to an admixture of the latter into the former. Such transitions may provide a way of selecting closely spaced pairs of atoms.

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