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Updated: May 24, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Dephasing of multiparticle Rydberg excitations for fast entanglement generation
F Bariani1, Y O Dudin, T A B Kennedy
1School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430, USA.
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.
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