Mainz 2026 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 58: Quantum Technologies – Color Centers I
Q 58.3: Talk
Thursday, March 5, 2026, 15:00–15:15, P 5
Optically Detected Magnetic Resonance on Carbene Molecular Qubits — •Simon Roggors1, 2, 3, Nico Striegler1, 2, 3, Thomas Unden1, Oleksiy Khavryuchenko1, 4, 5, Alon Salhov1, 6, Jochen Scharpf1, Martin B. Plenio3, 7, Alex Retzker6, Fedor Jelezko2, 3, Matthias Pfender1, Philipp Neumann1, Tim R. Eichhorn1, Tobias A. Schaub1, 2, 3, and Ilai Schwartz1 — 1NVision Imaging Technologies GmbH, Wolfgang-Paul-Str. 2, Ulm 89081, Germany — 2Institute for Quantum Optics (IQO), Ulm University — 3Center for Integrated Quantum Science and Technology (IQST), Ulm — 4Shupyk National Healthcare University of Ukraine — 5Institute of Organic Chemistry of the National Academy of Sciences of Ukraine — 6Racah Institute of Physics, The Hebrew University of Jerusalem — 7Institute of Theoretical Physics, Ulm University
Solid-state quantum systems that integrate optical and spin degrees of freedom are central to emerging quantum technologies, yet their scalability and tunability remains challenging. Molecular qubits embedded in crystalline host matrices offer a promising path forward due to their engineerable optical and spin properties. Here, we introduce ground-state triplet carbenes as fully organic systems that enable spatially precise photoactivation, exhibit large zero-field splitting, and provide clear optical initialization and readout of their spin states with high fluorescence contrast. These systems also maintain remarkably long coherence times at cryogenic temperatures, underscoring their potential as versatile and scalable building blocks for future quantum applications.
Keywords: Molecular Qubits; Quantum Optics; Carbenes; optically detected magnetic resonance; Quantum computing