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THU: Thursday Contributed Sessions
THU 13: Poster Session: Applications
THU 13.56: Poster
Thursday, September 11, 2025, 16:30–18:30, ZHG Foyer 1. OG
Coherent Control of a Coupled Three-Electron Spin Quantum Register in Diamond — •Fabian Müller1, Samuele Brambilla1, Timo Joas1, Philipp J. Vetter1, Tobias Spohn1, Matthias M. Müller2, and Fedor Jelezko1 — 1Institute for Quantum Optics, Ulm University, 89081 Ulm, Germany — 2Peter Grünberg Institute-Quantum Control (PGI-8), Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
High-fidelity gates between coupled electron spins at room temperature were recently demonstrated using molecularly implanted nitrogen-vacancy (NV) centers in diamond [1]. In addition to NV centers, the implantation can also create P1 defects, offering further scalability for the system.
In this work, we demonstrate the initialization, control and readout of a single P1 defect and its nuclear spin via a coupled NV-NV pair. DEER spectroscopy allows us to selectively address the P1 center’s eigenstates through the nearby NV center. Polarization and readout of the P1 center’s electron and nuclear spin are achieved using the PulsePol sequence. Our work expands the scalability of room-temperature electron spin registers in diamond.
[1] T. Joas et al. Physical Review X 15.2 (2025) 021069.
Keywords: nitrogen-vacancy center; P1 defect; DEER spectroscopy; room-temperature electron spin control; diamond quantum registers