Back and forth transfer and coherent coupling in a cold Rydberg dipole gas

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  • M Mudrich
  • N. Zahzam
  • ,
  • Thomas Vogt
  • ,
  • Daniel Comparat
  • ,
  • Pierre Pillet

Coupling by the resonant dipole-dipole energy transfer between cold cesium Rydberg atoms is investigated using time-resolved narrow-band deexcitation spectroscopy. This technique combines the advantage of efficient Rydberg excitation with high-resolution spectroscopy at variable interaction times. Dipole-dipole interaction is observed spectroscopically as avoided level crossing. The coherent character of the process is linked to back and forth transfer in the np+np ns+(n+1)s reaction. Decoherence in the ensemble has two different origins: the atom motion induced by dipole-dipole interaction and the migration of the s-Rydberg excitation in the environment of p-Rydberg atoms.

TidsskriftPhysical Review Letters
Antal sider4
StatusUdgivet - 2 dec. 2005

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