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Science & Career Talk with Dr. Maria-José (Pepa) Martínez-Pérez on 22 July 2025 at 13:00

Title: Van der Waals magnonic cavities

Superconducting resonators are essential to solid-state quantum technologies, enabling key functions like qubit readout and signal amplification. Coplanar LC resonators, in particular, offer strong qubit-photon coupling due to their low losses and compact size. However, their size cannot be scaled down to the nanoscale, limiting the ability to reach stronger coupling regimes needed for studying new physics and advancing spin qubit applications. Achieving such strong coupling with current superconducting circuits remains nearly out of reach today.

In this talk, I introduce VdW-QED - a radically new platform that leverages magnonic resonators made from van der Waals (vdW) antiferromagnetic insulators for cavity quantum electrodynamics (QED) experiments with spin qubits. I will demonstrate our first key achievement: the experimental observation of strong magnon-spin coupling between CrSBr, which serves as the magnonic cavity, and GdW10, which forms the solid-state spin ensemble. By detecting an anticrossing and identifying signatures of dark states, we quantitatively confirm that the coupling is coherent and exhibits well-defined symmetries. These findings open the door to using CrSBr and similar layered materials as magnonic cavities in hybrid quantum systems, offering exciting prospects for both fundamental physics and applied device research.

The talk will be in English.

When: 22 July 2025 at 13:00

Where: D4A19, D-Bau, Auf der Morgenstelle 14

More information: https://uni-tuebingen.de/en/221946

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Six Clusters of Excellence for the University of Tübingen

Tübingen achieves remarkable success and has good chance of maintaining its University of Excellence title – Top research in three areas to be sustained from other sources of support

On Thursday, the German Research Foundation (DFG) in Bonn announced that under the German government’s Excellence Strategy the University of Tübingen will receive funding for six Clusters of Excellence starting on January 1, 2026. This includes three existing clusters whose funding has been renewed. Under the Excellence Strategy guidelines, the University of Tübingen can now apply for the second funding line to renew its status as one of Germany’s Universities of Excellence.

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