Long-Lived Solid-State Optical Memory for High-Rate Quantum Repeaters

Journal article (2021)

Authors

M. Falamarzi Askarani Kavli institute of nanoscience Delft, QID/Tittel Lab - QuTech Advanced Research Centre , QuTech Advanced Research Centre
A. Das QuTech Advanced Research Centre, Kavli institute of nanoscience Delft, QID/Tittel Lab - QuTech Advanced Research Centre
J.H. Davidson QuTech Advanced Research Centre, QID/Tittel Lab - QuTech Advanced Research Centre , Kavli institute of nanoscience Delft
G. Castro do Amaral BUS/TNO STAFF - QuTech Advanced Research Centre , QuTech Advanced Research Centre, Kavli institute of nanoscience Delft
J.A. Slater QuTech Advanced Research Centre, BUS/Spider - QuTech Advanced Research Centre , Kavli institute of nanoscience Delft
S. Marzban Kavli institute of nanoscience Delft, QID/Tittel Lab - QuTech Advanced Research Centre , QuTech Advanced Research Centre
Rufus L. Cone Montana State University - Bozeman
Daniel Oblak University of Calgary
W. Tittel QuTech Advanced Research Centre, Quantum Communications Lab - EEMCS , Université de Genève, Kavli institute of nanoscience Delft, QID/Tittel Lab - QuTech Advanced Research Centre , Schaffhausen Institute of Technology–SIT, Geneva
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Research Group
QID/Tittel Lab (QuTech Advanced Research Centre) (TU Delft)
Copyright: © 2021 M. Falamarzi Askarani, A. Das, J.H. Davidson, G. Castro do Amaral, J.A. Slater, S. Marzban, Rufus L. Cone, Daniel Oblak, W. Tittel, More Authors
DOI
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https://doi.org/10.1103/PhysRevLett.127.220502
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Published Date

2021

Language

English

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Faculty

QuTech Advanced Research Centre

Department

Quantum Internet Division

Research Group

QID/Tittel Lab

Abstract

We argue that long optical storage times are required to establish entanglement at high rates over large distances using memory-based quantum repeaters. Triggered by this conclusion, we investigate the 795.325 nm3 H6↔H34 transition of Tm:Y3Ga5O12 (Tm:YGG). Most importantly, 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 protocol during up to 100 μs as well as a memory decay time Tm of 13.1 μs. Possibilities of how to narrow the gap between the measured value of Tm and its maximum of 275 μs are discussed. In addition, we demonstrate multiplexed storage, including with feed-forward selection, shifting and filtering of spectral modes, as well as quantum state storage using members of nonclassical photon pairs. Our results show the potential of Tm:YGG for creating multiplexed quantum memories with long optical storage times, and open the path to repeater-based quantum networks with high entanglement distribution rates.