title: Dephasing of multiparticle Rydberg excitations for fast entanglement generation.
abstract: An approach to fast entanglement generation based on Rydberg dephasing of collective excitations (spin waves) in large, optically thick atomic ensembles is proposed. Long-range 1/r(3) atomic interactions are induced by microwave mixing of opposite-parity Rydberg states. The required long coherence times are achieved via four-photon excitation and readout of long wavelength spin waves. The dephasing mechanism is shown to have favorable, approximately exponential, scaling for entanglement generation.
authors.affiliation: School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, USA.
authors.forename: F
authors.initials: F
authors.lastname: Bariani
authors.forename: Y O
authors.initials: YO
authors.lastname: Dudin
authors.forename: T A B
authors.initials: TA
authors.lastname: Kennedy
authors.forename: A
authors.initials: A
authors.lastname: Kuzmich