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Q: Fachverband Quantenoptik und Photonik

Q 29: Poster – Quantum Technologies I

Q 29.15: Poster

Tuesday, March 3, 2026, 17:00–19:00, Philo 2. OG

Interfacing a rack-mounted narrow-band photon pair-source with a quantum memory — •Leon Meßner^1,2, Anne Rohwäder^1,3, Mathilde Kakuschke^1,3, Helen Chrzanowski⁴, and Janik Wolters^2,3,1 — ¹Advanced Quantum Light Sources UG, Berlin, Germany — ²German Aerospace Center (DLR), Institute of Space Research, Berlin, Germany — ³Technical University Berlin, Institut of Physics and Astronomy, Berlin, Germany — ⁴Institute of Physics, Humboldt-Universität zu Berlin, Berlin, Germany

We present initial findings on interfacing a rack-mountable photon-pair source with a ladder-type quantum memory in warm Cesium vapor.

The monolithic cavity source generates heralded single photons with bandwidth and frequency consistent with the used memory transition at the D1 line. Using compact, off-the-shelve components, we achieve 45% heralding efficiency and a rate of approximately 50 kcts/(s mW).

Leveraging the noise-free and high-bandwidth photon storage capabilities of our memory [2], we explore applications for heterogeneous quantum networking and synchronization tasks.

[2] Maaß, B. et al., Phys. Rev. Applied 22, 044050 (2024)

Keywords: SPDC; photon sources; quantum memory