A long-lived spectrally multiplexed solid-state optical quantum memory for high-rate quantum repeaters

Antariksha Das*, Mohsen F. Askarani, Jacob H. Davidson, Gustavo C. Amaral, Neil Sinclair, Joshua A. Slater, Sara Marzban, Daniel Oblak, Wolfgang Tittel

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

Abstract

Long optical storage times are an essential requirement to establish high-rate entanglement distribution over large distances using memory-based quantum repeaters. Rare earth ion-doped crystals are arguably well-suited candidates for building such quantum memories. Toward this end, we investigate the 795.32 nm 3H63H4 transition of 1% thulium-doped yttrium gallium garnet crystal (Tm3+:Y3Ga5O12 : Tm3+:YGG). Most essentially, we find that the optical coherence time can reach 1.1 ms, and, using laser pulses, we demonstrate optical storage based on the atomic frequency comb (AFC) protocol up to 100 µs. In addition, we demonstrate multiplexed storage, including feed-forward selection, shifting, and filtering of spectral modes, as well as quantum state storage using members of non-classical photon pairs. Our results show that Tm:YGG can be a potential candidate for creating multiplexed quantum memories with long optical storage times.

Original languageEnglish
Number of pages7
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume12133
DOIs
Publication statusPublished - 2022
EventQuantum Technologies 2022 - Virtual, Online
Duration: 9 May 202220 May 2022

Keywords

  • Quantum Memory
  • Quantum Repeater
  • Rare-earth-ion-doped Crystal

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