Quantum registers based on single NV + n13C centers in diamond: I. The spin Hamiltonian method |
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| Authors: | A. P. Nizovtsev S. Ya. Kilin V. A. Pushkarchuk A. L. Pushkarchuk S. A. Kuten’ |
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| Affiliation: | 1.Stepanov Institute of Physics,National Academy of Sciences of Belarus,Minsk,Belarus;2.Belarusian State University of Informatics and Radioelectronics,Minsk,Belarus;3.Institute of Physical Organic Chemistry,National Academy of Sciences of Belarus,Minsk,Belarus;4.Institute for Nuclear Problems,Belarusian State University,Minsk,Belarus |
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| Abstract: | Details of the application of the spin Hamiltonian method for studying spin characteristics of a quantum register that includes an electron spin S = 1 of a single NV center in the ground electronic state and nuclear spins I = 1/2 of several isotopic atoms 13C located at different lattice sites near the vacancy of the NV center. Two methods of finding the hyperfine interaction tensors for these NV + n 13C spin systems are considered, one of which is based on the conventional electron spin resonance (ESR) method, while the other involves methods of quantum chemistry. The results of the latter method are compared with ESR data and with spectra of optically detected magnetic resonance (ODMR) and with the character of the modulation of the ODMR echo decay observed in single NV + n 13C systems. This comparison shows that the ab initio modeling of the spin characteristics of diamond nanoclusters containing NV centers makes it possible to obtain quantitative spin characteristics of the quantum registers under study. |
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