TY  - EJOUR
AU  - Grimm, Nick
AU  - Senkalla, Katharina
AU  - Vetter, Philipp J.
AU  - Frey, Jurek
AU  - Gundlapalli, Prithvi
AU  - Calarco, Tommaso
AU  - Genov, Genko
AU  - Müller, Matthias
AU  - Jelezko, Fedor
TI  - Coherent Control of a Long-Lived Nuclear Memory Spin in a Germanium-Vacancy Multi-Qubit Node
PB  - arXiv
M1  - FZJ-2025-01587
PY  - 2024
AB  - 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.
KW  - Quantum Physics (quant-ph) (Other)
KW  - FOS: Physical sciences (Other)
LB  - PUB:(DE-HGF)25
DO  - DOI:10.48550/ARXIV.2409.06313
UR  - https://juser.fz-juelich.de/record/1038615
ER  -