Control Protocols for Entangling Gates for Group-IV Color-Centers in Diamond

• URL: http://arxiv.org/abs/2607.07549v1
• Date: Wed, 08 Jul 2026 15:47:03 GMT
• Title: Control Protocols for Entangling Gates for Group-IV Color-Centers in Diamond
• Abstract summary: We show that there are three different types of entangling gates where the entanglement is mediated by the parallel hyperfine-coupling component.<n>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.
• Score: 0.0347577906896546
• License: http://creativecommons.org/licenses/by/4.0/
• 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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