Dephasing of Multiparticle Rydberg Excitations for Fast Entanglement Generation

2011/07/31 by Francesco Bariani, F. Bariani, Y. O. Dudin +2 · 2 citations
Computer Science · Physics and Astronomy · #Atomic physics #Coherence (philosophical gambling strategy) #Cold Atom Physics and Bose-Einstein Condensates #Dephasing #Excitation #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum entanglement #Quantum mechanics #Quantum optics and atomic interactions #Rydberg atom #Rydberg formula #Rydberg state #physics.atom-ph #quant-ph

paper · pdf · doi:10.1103/physrevlett.108.030501

published as Phys. Rev. Lett. 108, 030501 (2012) · 4 pages, 3 figures

arxiv created 2011/12/08 · openalex publication_date 2012/01/19 · arxiv updated 2012/01/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• Demonstration of a Stable Atom-Photon Entanglement Source for Quantum Repeaters
• Quantum Gates and Multiparticle Entanglement by Rydberg Excitation Blockade and Adiabatic Passage
• Fast and robust approach to long-distance quantum communication with atomic ensembles
• Observation of Rydberg blockade between two atoms
• Long-distance quantum communication with atomic ensembles and linear optics

Cited by

• Crossover from electromagnetically induced transparency to Autler–Townes splitting in open ladder systems with Doppler broadening
• Electromagnetically induced transparency of ultra-long-range Rydberg molecules