Strongly Coupled Diamond Spin Qubits by Molecular Nitrogen Implantation

Abstract

Ionized nitrogen molecules (${}^{15}$N${}_2^{+}$) are used as efficient point sources for creating NV${}^{-}$ pairs in diamond with nanoscale spatial separation and up to 55 kHz magnetic coupling strength. Co-implantation of ${}^{12}$C${}^{+}$ increased the yield of pairs, and a ${}^{13}$C-depleted diamond allowed 0.65 ms coherence times to be obtained. Further coupling to a third dark spin provided a strongly coupled three spin register. These results mark an important step towards realization of multi-qubit systems and scalable NV${}^{-}$ quantum registers.

Accepted for publication in Physical Review B: rapid communications

References in corpus (7)

• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Room temperature entanglement between distant single spins in diamond
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• Three-dimensional localization of spins in diamond using 12C implantation
• Tunable and Transferable Diamond Membranes for Integrated Quantum Technologies
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• Fabrication of ${}^{15}{\text{NV}}^{-}$ centers in diamond using a deterministic single ion implanter
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• Performance of quantum registers in diamond in the presence of spin impurities
• Enhanced and tunable electric dipole-dipole interactions near a planar metal film
• Atomic-scale positioning of single spins via multiple nitrogen-vacancy centers
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• Detection of Electron Paramagnetic Resonance of Two Electron Spins Using a Single NV Center in Diamond
• Dynamical nuclear polarization for dissipation-induced entanglement in NV centers
• Sub-diffraction optical manipulation of the chargestate of nitrogen vacancy center in diamond
• Isotope engineering of silicon and diamond for quantum computing and sensing applications
• Irradiation-Induced Spin Bath Evolution and as-Grown Hydrogen Defects in CVD Diamond Revealed by NV-Based DEER Spectroscopy