Coherent Control of a Long-Lived Nuclear Memory Spin in a Germanium-Vacancy Multi-Qubit Node

• URL: http://arxiv.org/abs/2409.06313v1
• Date: Tue, 10 Sep 2024 08:14:42 GMT
• Title: Coherent Control of a Long-Lived Nuclear Memory Spin in a Germanium-Vacancy Multi-Qubit Node
• Authors: Nick Grimm, Katharina Senkalla, Philipp J. Vetter, Jurek Frey, Prithvi Gundlapalli, Tommaso Calarco, Genko Genov, Matthias M. Müller, Fedor Jelezko,
• Abstract summary: We show coherent control of a $13$C nuclear spin strongly coupled to a negatively charged germanium-vacancy center in diamond. Detailed analysis allows us to model the system's dynamics, extract the coupling parameters, and characterize noise. We estimate an achievable memory time of 18.1s with heating limitations considered, paving the way to successful applications as a quantum repeater node.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The ability to process and store information on surrounding nuclear spins is a major requirement for group-IV color center-based repeater nodes. We demonstrate coherent control of a ${}^{13}$C nuclear spin strongly coupled to a negatively charged germanium-vacancy center in diamond with coherence times beyond 2.5s at mK temperatures, which is the longest reported for group-IV defects. Detailed analysis allows us to model the system's dynamics, extract the coupling parameters, and characterize noise. We estimate an achievable memory time of 18.1s with heating limitations considered, paving the way to successful applications as a quantum repeater node.

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