TY  - JOUR
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 M.
AU  - Jelezko, Fedor
TI  - Coherent Control of a Long-Lived Nuclear Memory Spin in a Germanium-Vacancy Multi-Qubit Node
JO  - Physical review letters
VL  - 134
IS  - 4
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2025-02091
SP  - 043603
PY  - 2025
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 13C nuclear spin strongly coupled to a negatively charged germanium-vacancy center in diamond with coherence times beyond 2.5 s 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 18.1 s with heating limitations considered, paving the way to successful applications as a quantum repeater node.
LB  - PUB:(DE-HGF)16
C6  - 39951594
UR  - <Go to ISI:>//WOS:001438435400002
DO  - DOI:10.1103/PhysRevLett.134.043603
UR  - https://juser.fz-juelich.de/record/1040969
ER  -