Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 19: Quantum Networks, Repeaters, and QKD II (joint session Q/QI)
Q 19.1: Talk
Tuesday, March 11, 2025, 11:00–11:15, AP-HS
Standalone mobile quantum memory system — •Martin Jutisz1, Alexander Erl2,3, Janik Wolters2,3, Mustafa Gündoğan1, and Markus Krutzik1,4 — 1Humboldt-Universität zu Berlin and IRIS Adlershof, Berlin, Germany — 2Technische Universität Berlin, Berlin, Germany — 3Deutsches Zentrum für Luft- und Raumfahrt, Berlin, Germany — 4Ferdinand-Braun-Institut (FBH), Berlin, Germany
Quantum memories (QMs) are central to many applications in quantum information science. As a necessary element of quantum repeaters, these devices should be able to operate in non-laboratory environments, and as such their future deployment in space could advance global quantum communication networks [1]. In this context, warm-vapor QMs are particularly promising due to their low complexity and low size, weight and power.
We will present the implementation and performance analysis of a portable rack-mounted standalone warm vapor quantum memory system [2]. The optical memory is based on hyperfine ground states of Cesium which are connected to an excited state via the D1 line at 895 nm in a lambda-configuration. The memory is operated with weak coherent pulses containing on average < 1 photons per pulse. The long-term stability of the memory efficiency and storage fidelity is demonstrated over a period of 28 hours together with operation in a non-laboratory environment.
[1] M. Gündoğan et al., npj Quantum Information 7, 128 (2021)
[2] M. Jutisz et al., arXiv:2410.21209 (2024)
Keywords: Quantum Memory; Quantum Communication; Quantum Repeater; warm-vapor