Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

MON: Monday Contributed Sessions

MON 8: Quantum Sensing and Decoherence: Contributed Session to Symposium I

MON 8.1: Vortrag

Montag, 8. September 2025, 14:15–14:30, ZHG009

Diamond-based quantum processors - State-of-the-art and future challenges — Lukas Antoniuk¹, Gopi Balasubramanian¹, Priya Balasubramanian^1,2, Jan Binder¹, Jason Choudhury¹, Florian Frank¹, Matthias Gerster¹, •Julian Rickert¹, Janani Sevvel¹, and Mukesh Tripathi¹ — ¹XeedQ GmbH, Augustusplatz 1-4, D-04109 Leipzig, Germany — ²Institute for Quantum Optics, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany

Engineered colour centres within diamond have demonstrated the potential for quantum sensing, communication, and computing. Coherent control of a few qubits has been demonstrated in group-IV- and NV-centres. Currently, NV systems are the only commercially available diamond quantum processors. State-of-the-art designs couple NV centres to nearby nuclear spins and directly to other NVs. Our work employs electron-beam lithography and focused ion beam implantation to fabricate high-purity diamond chips with tailored defects. We characterize these chips by benchmarking qubit coherence, single- and two-qubit NV gate operations, NV-nuclear spin control protocols, and NV-NV entanglement. Our efforts deliver comprehensive quantum control beyond existing lab demonstrations. However, scaling beyond a few qubits is complicated by material quality, fabrication precision, and nanoscale addressability. We are working on overcoming engineering, integration, and control challenges to enable scalable networks of interlinked NV centres.

Keywords: Quantum computing; Diamond fabrication; Characterization of spin systems; Nitrogen-vacancy centres; Scalable spin networks