Optical Quantum Memory In Atomic Barium With 880 GHz Bandwidth and 95% Storage Efficiency

Kai Shinbrough, Benjamin D. Hunt, Sehyun Park, Kathleen Oolman, Tegan Loveridge, J. Gary Eden, Virginia O. Lorenz

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We demonstrate quantum memory of single-photon-level coherent pulses of 880 GHz bandwidth with 95.6(3)% storage efficiency in collisionally broadened barium vapor. We measure 26(1)% total efficiency, limited by control field power; 0.49(1) ns memory lifetime, limited by motional dephasing; and a signal-to-noise ratio of O (103), limited by two-photon control field scattering. To the best of the authors' knowledge, this represents the best efficiency, lifetime, and noise performance of atomic quantum memories in the ultrabroadband regime (> 100 GHz bandwidth) to date.

Original languageEnglish (US)
Title of host publication2023 Photonics North, PN 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350326734
StatePublished - 2023
Event2023 Photonics North, PN 2023 - Montreal, Canada
Duration: Jun 12 2023Jun 15 2023

Publication series

Name2023 Photonics North, PN 2023


Conference2023 Photonics North, PN 2023

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Instrumentation
  • Atomic and Molecular Physics, and Optics


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