Preprint

FZJ-2026-03345

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Control Protocols for Entangling Gates for Group-IV Color-Centers in Diamond

Frey, J.FZJ* ; Müller, M. (Corresponding author)FZJ* ; Wilhelm-Mauch, F.FZJ*

2026

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Please use a persistent id in citations: doi:doi:10.48550

Report No.: 2607.07549

Abstract: Accurately controlling entangling gates remains a major challenge for quantum technology applications with solid-state spin qubits. Here, we study a group-IV color-center with a strongly-coupled nuclear spin and approach the problem from a quantum control perspective. We show that there are three different types of entangling gates where the entanglement is mediated by the parallel hyperfine-coupling component, the orthogonal one or both. We derive the respective quantum speed limits (QSL) and show by means of dynamical decoupling, resonant driving of single- and double-quantum transitions, quantum optimal control and algebraic gate decomposition how these gates can be realized. We finally discuss the experimental applicability.

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Contributing Institute(s):

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

Research Program(s):

1. 5221 - Advanced Solid-State Qubits and Qubit Systems (POF4-522) (POF4-522)
2. DFG project G:(GEPRIS)390534769 - EXC 2004: Materie und Licht für Quanteninformation (ML4Q) (390534769) (390534769)
3. OpenSuperQPlus100 - Open Superconducting Quantum Computers (OpenSuperQPlus) (101113946) (101113946)
4. BMBF 13N16210 - SPINNING – Spin-Photon-basierter Quantencomputer auf Diamantbasis (BMBF-13N16210) (BMBF-13N16210)
5. SPINUS - Spin based quantum computer and simulator (101135699) (101135699)

Appears in the scientific report 2026

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