Mainz 2026 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 66: Poster – Quantum Technologies III

Q 66.32: Poster

Thursday, March 5, 2026, 17:00–19:00, Philo 2. OG

A Quantum Frequency Conversion Interface for Silicon Vacancy based Quantum Networks — •Konstantin Beck¹, Donika Imeri^{1, 2}, Leonie Eggers^{1, 2}, Lasse Irrgang¹, Nick Brinkmann^{1, 2}, Sunil Mahato^{1, 2}, Rikhav Shah¹, Roman Schnabel^{1, 2}, and Ralf Riedinger^{1, 2} — ¹Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany — ²The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany

Silicon vacancy (SiV) centers in diamond have shown great potential for applications in quantum sensing and quantum communication, due to their optically addressable spin transitions and stability against noise. At temperatures below 300 mK, the SiV has a long-lived spin degree of freedom that enables its use as a quantum network node.

We propose a high bandwidth quantum frequency conversion (QFC) interface for SiV centers in diamond, aimed at enabling their integration into fiber based quantum networks. The concept relies on a one*step conversion process in a compact, doubly resonant cavity, enabling efficient translation of SiV emission into the telecom E*band while preserving quantum coherence. This architecture outlines a pathway toward scalable, SiV based quantum networks and photonic cluster states.

Keywords: Silicon Vacancy; Quantum Frequency Conversion; Quantum Network; Color Centers