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  • Letter
  • Open Access

Initialization protocol for efficient quantum memories using resolved hyperfine structure

James S. Stuart, Morgan Hedges, Rose Ahlefeldt, and Matthew Sellars*

  • Centre for Quantum Computation and Communications Technology, Research School of Physics, Australian National University, Canberra, ACT, Australia

  • *Corresponding author: matthew.sellars@anu.edu.au
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Phys. Rev. Research 3, L032054 – Published 27 August, 2021

DOI: https://doi.org/10.1103/PhysRevResearch.3.L032054

Abstract

We describe a quantum memory spectral preparation strategy that optimizes memory efficiency and bandwidth in materials such as Er3+167:Y2SiO5 in a high-field regime, where the hyperfine structure is resolved. We demonstrate the method in Er3+167:Y2SiO5 by preparing spectrally isolated 18-dB-absorbing features on a <1 dB background. Using these features we create an atomic frequency comb and show a quantum storage of 200-ns pulses with 22% efficiency, limited by the background absorption which arises from laser instability. We describe the experimental improvements needed to reach the material limits: O(1)-s spin-state storage, O(100)MHz bandwidth, and >90% efficiency.

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Outline

Information

Phys. Rev. Research 3, L032054– Published 27 August, 2021
  • Received 21 April 2021
  • Revised 8 July 2021
  • Accepted 21 July 2021
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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