Bonn 2025 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 21: Poster – Atomic Systems in External Fields

A 21.4: Poster

Mittwoch, 12. März 2025, 17:00–19:00, Tent

Design and realisation of magnetic field coils for quantum network node experiments — •Vincent Beguin, Raphael Benz, Sebastián Alejandro Morales Ramirez, Micha Kappel, Krishna Relekar, and Stephan Welte — 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany

The Implementation of a quantum communication network is a challenging task which is addressed in several hardware platforms. Among these, neutral atoms coupled to optical cavities offer a promising approach for realizing quantum networks, with potential applications ranging from distributed quantum computing to secure quantum communication. For these applications, it is crucial to establish well-defined conditions in the spatial region where the atoms are located. In particular, precise control over external magnetic field is essential, as the application of a constant guiding field along the cavity axis is a prerequisite for most experimental protocols.

Here we present the design and implementation of a set of three rectangular magnetic field coils arranged in a Helmholtz configuration. The coils are oriented in three spatial directions, enabling compensation of the Earth's magnetic field and the application of a guiding field along the cavity axis. We characterize important characteristics of our setup, including the heating effects and the field homogeneity within the central region between the coils.

Keywords: quantum network; magnetic field; neutral atoms