Bonn 2025 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

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

Q 62.1: Poster

Thursday, March 13, 2025, 17:00–19:00, Tent

Design of a tweezer setup for rearrangement and addressing of single atoms in an optical cavity — •Micha Kappel, Raphael Benz, Sebastián Alejandro Morales Ramirez, Vincent Beguin, Krishna Relekar, and Stephan Welte — 5. Physikalisches Institut, Center for Integrated Quantum Science and Technology and CZS Center QPhoton, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany

Neutral atoms coupled to an optical cavity are a promising platform for implementing quantum network nodes. To realize network nodes with multiple stationary atomic qubits, it is crucial to position and address the atoms precisely within the cavity mode. We present an optical design utilizing two two-dimensional acousto-optical deflectors to create optical tweezers capable of trapping arrays of Rubidium atoms inside the cavity. This setup not only facilitates precise atom trapping but also enables individual addressing and rearrangement of the atoms.

To mitigate the inevitable atom losses during operation, we propose the inclusion of a reservoir containing additional atoms in a tweezer array outside the cavity mode. These extra atoms can be used to replenish lost atoms within the cavity. We describe our optical setup and discuss experimental techniques and challenges.

Keywords: Optical Tweezer; Optical Cavity; Dynamic Atom Array