Isotopic identification of engineered nitrogen-vacancy spin qubits in ultrapure diamond
Isotopic identification of engineered nitrogen-vacancy spin qubits in ultrapure diamond
Nitrogen impurities help to stabilize the negatively-charged-state of ${\mathrm{NV}}^{\ensuremath{-}}$ in diamond, whereas magnetic fluctuations from nitrogen spins lead to decoherence of ${\mathrm{NV}}^{\ensuremath{-}}$ qubits. It is not known what donor concentration optimizes these conflicting requirements. Here we used 10-MeV ${}^{15}{\mathrm{N}}^{3+}$ ion implantation to create ${\mathrm{NV}}^{\ensuremath{-}}$ in ultrapure diamond. Optically detected magnetic …