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; Charles W. Thiel; Rufus L. Cone; Wolfgang Tittel

doi:10.1117/12.2620943

31 May 2022 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, Charles W. Thiel, Rufus L. Cone, Wolfgang Tittel

Author Affiliations +

Proceedings Volume 12133, Quantum Technologies 2022; 1213305 (2022) https://doi.org/10.1117/12.2620943
Event: SPIE Photonics Europe, 2022, Strasbourg, France

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 ³H₆ ↔ ³H₄ 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.

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Antariksha Das, Mohsen F. Askarani, Jacob H. Davidson, Gustavo C. Amaral, Neil Sinclair, Joshua A. Slater, Sara Marzban, Daniel Oblak, Charles W. Thiel, Rufus L. Cone, and Wolfgang Tittel "A long-lived spectrally multiplexed solid-state optical quantum memory for high-rate quantum repeaters", Proc. SPIE 12133, Quantum Technologies 2022, 1213305 (31 May 2022); https://doi.org/10.1117/12.2620943

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