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Nitrogen atoms encased in cavities within the beryl structure as candidates for qubits

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Abstract

Two new paramagnetic centers (N1 and N2) have been observed after γ-irradiation of a beryl single crystal. The observation of zero-field splitting from the electronic spin-state quartet and the isotropic hyperfine splitting with values similar to that of the free nitrogen atom enables us to suppose that the new paramagnetic centers are nitrogen atoms resulting from radiolysis of molecular nitrogen inside the structural channels of beryl. The following parameters of the spin Hamiltonian were determiend:g=2.0021±0.0003,A/h=13.7±0.1 MHz, andD/h=44.6±0.2 for N1 and 37.6±0.2 MHz for N2 with unique directions of zero-field splittingD along the optical axisc. An amazing resilience of the atomic properties of nitrogen trapped within the structural cavity has been experimentally observed. The N1 paramagnetic atom is stable up to 280°C. We suggest that the structural cavity in beryl could be a shelter for qubits encoded in electron spins of hydrogen or nitrogen atoms.

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Authors and Affiliations

  1. Institute of Mineralogy and Petrography, 630090, Novosibirsk, Russian Federation

    R. I. Mashkovtsev & V. G. Thomas

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  1. R. I. Mashkovtsev
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  2. V. G. Thomas
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Correspondence to R. I. Mashkovtsev.

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Mashkovtsev, R.I., Thomas, V.G. Nitrogen atoms encased in cavities within the beryl structure as candidates for qubits. Appl. Magn. Reson. 28, 401–409 (2005). https://doi.org/10.1007/BF03166771

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  • DOI: https://doi.org/10.1007/BF03166771

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