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Qubit Coherence Noise Stability Characterization

Long-lived state of a helium-like magnesium donor in silicon

arXiv
Authors: R. Kh. Zhukavin, D. A. Postnov, P. A. Bushuikin, K. E. Kudryavtsev, K. A. Kovalevsky, V. V. Tsyplenkov, N. A. Bekin, A. N. Lodygin, L. M. Portsel, V. B. Shuman, Yu. A. Astrov, N. V. Abrosimov, V. N. Shastin

Year

2026

Paper ID

4078

Status

Preprint

Abstract Read

~2 min

Abstract Words

79

Citations

N/A

Abstract

The relaxation of ortho states of a helium-like Mg donor in silicon is investigated by measuring the modulation of background radiation transmission through impurity centers under pulsed photoexcitation. Long-lived states of the spin-triplet 1s(3T2) group with a lifetime of about 20 ms are observed. The temperature dependence indicates that the relaxation is governed by the Orbach mechanism with an activation energy 13 meV, which is close to the exchange splitting energy of the excited 1s states of the Mg donor.

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  • The relaxation of ortho states of a helium-like Mg donor in silicon is investigated by measuring the modulation of background radiation transmission through impurity centers...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2601.04933 [2] arXiv https://arxiv.org/abs/2601.04933 [3] Publisher https://arxiv.org/abs/2601.04933

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