Dephasing of multiparticle Rydberg excitations for fast entanglement generation

Details Dephasing of multiparticle Rydberg excitations for fast entanglement generation Dephasing of multiparticle Rydberg excitations for fast entanglement generation

2011-07-16

arxiv.org/abs/1107.3202v2

Phys. Rev. Lett. 108, 030501 (2012)

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.108.030501

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. Required long coherence times are achieved via four-photon excitation and read-out of long wavelength spin-waves. The dephasing mechanism is shown to have favorable, approximately exponential, scaling for entanglement generation.

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