Optical coherence and relaxation dynamics in a thulium-doped yttrium gallium garnet crystal for quantum memory applications

POSTER

Abstract

Rare-earth ion-doped crystals with a long optical coherence lifetime are of great interest to serve as solid-state multimode quantum memories in frequency-multiplexed quantum repeater architectures. Towards this end, spectroscopic investigation on yttrium gallium garnet -YGG crystal cooled to 500 mK and doped with 1% Tm3+ is presented. At low magnetic fields (a few hundreds of Gauss), this crystal offers an optical coherence lifetime exceeding one millisecond and ground-state Zeeman level lifetime as long as tens of seconds. Furthermore, we characterize and model the time evolution of spectral holes at different magnetic fields for various temperatures in the view of spectral diffusion which is crucial to understand in order to build an efficient long-lived quantum memory.

*Netherlands Organization for Scientific Research (NWO); the European Unions Horizon 2020 Research and Innovation Program under Grant Agreement No. 820445 and Project Name Quantum Internet Alliance (QIA), the Canadian Institute for Advanced Research (CIFAR); Air Force Research Laboratory under agreement number FA8750-20-1-1004.

Presenters

  • Antariksha Das

    • Delft University of Technology

Authors

  • Antariksha Das

    • Delft University of Technology

  • Mohsen Falamarzi Askarani

    • QuTech, Delft University of Technology
    • Delft University of Technology

  • Jacob Davidson

    • Delft University of Technology

  • Neil Sinclair

    • Harvard University

  • Joshua A Slater

    • Delft University of Technology

  • Sara Marzban

    • QuTech, Delft University of Technology
    • Delft University of Technology

  • Daniel Oblak

    • University of Calgary

  • Charles W Thiel

    • Department of Physics, Montana State University
    • Montana State University

  • Rufus L Cone

    • Department of Physics, Montana State University
    • Montana State University

  • Wolfgang Tittel

    • Delft University of Technology, University of Geneva and Schaffhausen Institute for Technology in Geneva
    • QuTech, Delft University of Technology
    • Delft University of Technology & Department of Applied Physics, University of Geneva & Schaffhausen Institute of Technology in Geneva
    • Delft Univiersity of Technology