Mainz 2026 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 28: Poster – Quantum Optics

Q 28.7: Poster

Dienstag, 3. März 2026, 17:00–19:00, Philo 2. OG

Development of an experimental setup for quantum network experiments based on neutral atoms in an optical cavity — Raphael Benz, •Sebastián Alejandro Morales Ramírez, Micha Kappel, Daniel Reigel, Maurizio Trigilia, Luis Weiß, Vincent Beguin, Leon Layer, Violet Ruf, and Stephan Welte for the QNN collaboration — 5. Physikalisches Institut, Center for Integrated Quantum Science and Technology and CZS Center QPhoton, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany.

The practical implementation of a quantum coherent network remains a pursued challenge across various hardware platforms. Cold neutral atoms trapped in a high-finesse optical cavity have proven to be a promising platform due to the efficient light-matter coupling and precise controllability of the system. Using optical tweezers to address individual atoms opens the possibility of extending this platform to versatile multi-qubit quantum network nodes. We present the progress and current status of our experimental setup with an emphasis on the planned vacuum system and the cavity design. We designed a 650-um-long cavity with a finesse of 40,000; it consists of two macroscopic super-polished mirrors, enabling single-atom cooperativities of C=5.2. To suppress mechanical vibrations, we developed a three-stage vibration isolation system. We discuss the mounting of this new setup. With our system, a wide range of experiments becomes feasible, including photon-mediated quantum information processing between intra-cavity atoms, the generation of highly entangled photonic cluster states, and the creation of optical GKP states.

Keywords: Cavity QED; Quantum network nodes; Trapped neutral atoms; Quantum gates; Quantum communications