Coherence of Microwave and Optical Qubit Levels in Neutral Thulium Article Swipe

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D. Mishin , D. Tregubov , N. Kolachevsky , Artem Golovizin ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2508.12887

Hyperfine-encoded qubits in alkali atoms have established themselves as robust platforms for quantum computing, while alkaline-earth-like elements expand the state manipulation toolbox through their rich spectrum of optical transitions and metastable states. In this work, we demonstrate that thulium is a viable candidate for quantum computing, combining advantages of hyperfine qubit encoding with a rich energy-level structure of alkaline-earth-like atoms. We describe protocols for the initial state preparation and state-selective readout, and show single-qubit operations on the microwave transition at $1 497$ MHz. We demonstrate ground state hyperfine qubit coherence times up to $T_2^* = 22^{+2}_{-2}$ s and $T_2 = 55^{+59}_{-14}$ s, representing record-scale performance for neutral-atom systems. Furthermore, we show operations involving metastable optical states, including shelving for the state-selective readout as well as coherent population transfer of the ground state qubit with coherence time primarily limited by the metastable level natural lifetime of $112$ ms. These results mark the first step toward using thulium for quantum computing applications and highlight its promising characteristics.

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/2508.12887
PDF: https://arxiv.org/pdf/2508.12887
OA Status: green
OpenAlex ID: https://openalex.org/W4414491756

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DOI: https://doi.org/10.48550/arxiv.2508.12887

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Title: Coherence of Microwave and Optical Qubit Levels in Neutral Thulium

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Type: preprint

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Language: en

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Publication year: 2025

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Publication date: 2025-08-18

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Authors: D. Mishin, D. Tregubov, N. Kolachevsky, Artem Golovizin

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Landing page: https://arxiv.org/abs/2508.12887

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PDF URL: https://arxiv.org/pdf/2508.12887

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Cited by: 0

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