Resonant electric dipole-dipole interactions between cold Rydberg atoms in a magnetic field

Details Resonant electric dipole-dipole interactions between cold Rydberg atoms in a magnetic field Resonant electric dipole-dipole interactions between cold Rydberg atoms in a magnetic field

2006-04-21

arxiv.org/abs/physics/0604169v1

Phys. Rev. A 73, 063403 (2006)

Physics

Atomic Physics

Accepted for publication in Physical Review A

Scientific paper

10.1103/PhysRevA.73.063403

Laser cooled Rb atoms were optically excited to 46d Rydberg states. A microwave pulse transferred a fraction of the atoms to the 47p Rydberg state. The resonant electric dipole-dipole interactions between atoms in these two states were probed using the linewidth of the two-photon microwave transition 46d-47d. The presence of a weak magnetic field (approximately 0.5 G) reduced the observed line broadening, indicating that the interaction is suppressed by the field. The field removes some of the energy degeneracies responsible for the resonant interaction, and this is the basis for a quantitative model of the resulting suppression. A technique for the calibration of magnetic field strengths using the 34s-34p one-photon transition is also presented.

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