title: Spectroscopic observation of resonant electric dipole-dipole interactions between cold Rydberg atoms.
abstract: Resonant electric dipole-dipole interactions between cold Rydberg atoms were observed using microwave spectroscopy. Laser-cooled 85Rb atoms in a magneto-optical trap were optically excited to 45d(5/2) Rydberg states using a pulsed laser. A microwave pulse transferred a fraction of these Rydberg atoms to the 46p(3/2) state. A second microwave pulse then drove atoms in the 45d(5/2) state to the 46d(5/2) state, and was used as a probe of interatomic interactions. The spectral width of this two-photon probe transition was found to depend on the presence of the 46p(3/2) atoms, and is due to the resonant electric dipole-dipole interaction between 45d(5/2) and 46p(3/2) Rydberg atoms.
authors.affiliation: Department of Physics and Institute for Quantum Computing, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
authors.forename: K
authors.initials: K
authors.lastname: Afrousheh
authors.forename: P
authors.initials: P
authors.lastname: Bohlouli-Zanjani
authors.forename: D
authors.initials: D
authors.lastname: Vagale
authors.forename: A
authors.initials: A
authors.lastname: Mugford
authors.forename: M
authors.initials: M
authors.lastname: Fedorov
authors.forename: J D D
authors.initials: JD
authors.lastname: Martin