Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 21: Quantum Communication III
Q 21.8: Vortrag
Dienstag, 12. März 2024, 12:45–13:00, HS 3219
A compact and portable room temperature atomic vapor quantum memory — •Alexander Erl1,2, Martin Jutisz3, Elisa Da Ros3, Luisa Esguerra2,1, Leon Messner2, Mustafa Gündoğan3, Markus Krutzik3,4, and Janik Wolters2,1 — 1Technische Universität Berlin, Institut für Optik und Atomare Physik, Berlin — 2Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Institut für Optische Sensorsysteme, Berlin — 3Humboldt-Universität zu Berlin, Institut für Physik, Berlin — 4Ferdinand-Braun-Institut, Institut für Hochstfrequenztechnik, Berlin
In recent years, considerable progress has been made in the field of room temperature quantum memories. The inherent simplicity of this platform makes it very promising for use outside of laboratory environments, including in space-based applications. As an essential component of quantum repeaters, space-compatible memories could advance global quantum communication networks [1]. Here we present the implementation and performance analysis of a portable rack-mounted system, operated inside and outside of lab environment. This optical memory utilizes a lambda-scheme based on the Cesium D1 line transitions at 895 nm [2]. We achieve internal memory efficiencies of >40% for storage times of 500 ns. Employing attenuated coherent pulses, we observe storage and retrieval fidelities exceeding the classical threshold [3].
[1] M. Gündoğan et. al., npj Quantum Information 7, 128 (2021)
[2] L. Esguerra et al., Phys. Rev. A 107, 042607 (2023)
[3] M. Jutisz et. al., in preparation (2024)