Efficient creation of dipolar coupled nitrogen-vacancy spin qubits in diamond

Abstract

Coherently coupled pairs or multimers of nitrogen-vacancy defect electron spins in diamond have many promising applications especially in quantum information processing (QIP) but also in nanoscale sensing applications. Scalable registers of spin qubits are essential to the progress of QIP. Ion implantation is the only known technique able to produce defect pairs close enough to allow spin coupling via dipolar interaction. Although several competing methods have been proposed to increase the resulting resolution of ion implantation, the reliable creation of working registers is still to be demonstrated. The current limitation are residual radiation-induced defects, resulting in degraded qubit performance as trade-off for positioning accuracy. Here we present an optimized estimation of nanomask implantation parameters that are most likely to produce interacting qubits under standard conditions. We apply our findings to a well-established technique, namely masks written in electron-beam lithography, to create coupled defect pairs with a reasonable probability. Furthermore, we investigate the scaling behavior and necessary improvements to efficiently engineer interacting spin architectures.

arXiv commentMain article and supplementary information in one document. 20 pages, 11 figures

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Cited by in corpus (11)

• Sensitivity Optimization for NV-Diamond Magnetometry
• Tailoring spin defects in diamond
• Decoherence of two entangled spin qubits coupled to an interacting sparse nuclear spin bath: application to nitrogen vacancy centers
• Individual Control and Readout of Qubits in a Sub-Diffraction Volume
• Nanoscale spin manipulation with pulsed magnetic gradient fields from a hard disc drive writer
• Low-control and robust quantum refrigerator and applications with electronic spins in diamond
• Performance of quantum registers in diamond in the presence of spin impurities
• Sub-10 nm precision engineering of solid-state defects via nanoscale aperture array mask
• Control of an environmental spin defect beyond the coherence limit of a central spin
• Dynamical nuclear polarization for dissipation-induced entanglement in NV centers
• Resource state generation for a multispin register in a hybrid matter-photon quantum information processor