High-Fidelity Electron Spin Gates in a Scalable Diamond Quantum Register

• URL: http://arxiv.org/abs/2406.04199v2
• Date: Mon, 22 Jul 2024 06:47:33 GMT
• Title: High-Fidelity Electron Spin Gates in a Scalable Diamond Quantum Register
• Authors: Timo Joas, Florian Ferlemann, Roberto Sailer, Philipp J. Vetter, Jingfu Zhang, Ressa S. Said, Tokuyuki Teraji, Shinobu Onoda, Tommaso Calarco, Genko Genov, Matthias M. Müller, Fedor Jelezko,
• Abstract summary: We implement a robust, easy to implement entangling gate between NV spins in diamond. We demonstrate a record gate fidelity of $F=(96.0 pm 2.5)$ % under ambient conditions. Our identification of the dominant errors paves the way towards NV-NV gates beyond the error correction threshold.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Diamond is a promising platform for quantum information processing as it can host highly coherent qubits that could allow for the construction of large quantum registers. A prerequisite for such devices is a coherent interaction between nitrogen vacancy (NV) electron spins. Entanglement between dipolar-coupled NV spin pairs has been demonstrated, but with a limited entanglement fidelity and its error sources have not been characterized. Here, we design and implement a robust, easy to implement entangling gate between NV spins in diamond and quantify the influence of multiple error sources on the gate performance. Experimentally, we demonstrate a record gate fidelity of $F=(96.0 \pm 2.5)$ % under ambient conditions. Our identification of the dominant errors paves the way towards NV-NV gates beyond the error correction threshold.

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