Journal Article

FZJ-2025-02091

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Coherent Control of a Long-Lived Nuclear Memory Spin in a Germanium-Vacancy Multi-Qubit Node

Grimm, N. ; Senkalla, K. ; Vetter, P. J. ; Frey, J. (Corresponding author)FZJ* ; Gundlapalli, P. ; Calarco, T.FZJ* ; Genov, G. ; Müller, M. M.FZJ* ; Jelezko, F.

2025
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevLett.134.043603  doi:10.34734/FZJ-2025-02091

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 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.

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Contributing Institute(s):

1. Quantum Computing Analytics (PGI-12)
2. Quantum Control (PGI-8)

Research Program(s):

1. 5214 - Quantum State Preparation and Control (POF4-521) (POF4-521)
2. BMBF 13N16210 - SPINNING – Spin-Photon-basierter Quantencomputer auf Diamantbasis (BMBF-13N16210) (BMBF-13N16210)
3. SPINUS - Spin based quantum computer and simulator (101135699) (101135699)

Appears in the scientific report 2025

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; Nationallizenz ; SCOAP3 sponsored Journal ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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