Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 62: Poster – Quantum Information Technologies (joint session Q/QI)

Q 62.44: Poster

Donnerstag, 13. März 2025, 17:00–19:00, Tent

A rack-mounted narrow-band photon pair-source for interfacing with an atomic quantum memory — •Leon Meßner^1,2, Mathilde Kakuschke^1,3, Benjamin Maaß^2,3, Helen Chrzanowski⁴, and Janik Wolters^2,3,1 — ¹Advanced Quantum Light Sources UG, Berlin, Germany — ²Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Institute of Optical Sensor Systems, Berlin, Germany — ³Technische Universität Berlin, Institut für Optik und Atomare Physik, Berlin, Germany — ⁴Institut für Physik, Humboldt-Universität zu Berlin, Berlin, Germany

We present the implementation and performance analysis of a portable, rack-mounted photon-pair source for coupling to a ladder-type quantum memory in room-temperature Cesium vapor

The photon source [1] is generating photon-pairs with a bandwidth of 250 MHz, compatible to the linewidth and frequency needs of the atomic storage media. It has high coupling and heralding efficiencies up to 45%.

This allows research into crucial applications and fundamental questions of photon synchronization and shaping using a ladder-type quantum memory in warm alkali vapor [2]. Their fast and noise-free operation make them an ideal component for on-demand storage and retrieval of quantum information in photonic infrastructures.

[1] Mottola, R. et al., Optics Express 28, 3159-3170 (2020)
[2] Maaß, B. et al., Phys. Rev. Applied 22, 044050 (2024)

Keywords: SPDC; photon sources; quantum memory