Electron charge coherence on a solid neon surface
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866911100171190272 |
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| author | Li, Xinhao Zou, Shan Chen, Qianfan Jin, Dafei |
| author_facet | Li, Xinhao Zou, Shan Chen, Qianfan Jin, Dafei |
| contents | Recent experiments show ~0.1 ms coherence time for a single electron charge qubit on a solid neon surface. This remarkably long coherence time is believed to result from the intrinsic purity of solid neon as a qubit host. In this paper, we present theoretical studies on the decoherence mechanisms of an electron's charge (lateral motional) states on solid neon. At the typical experimental temperature of ~10 mK, the two main decoherence mechanisms are the phonon-induced displacement of neon surface and phonon-induced modulation of neon permittivity (dielectric constant). With a qubit frequency increasing from 1 GHz to 10 GHz, the charge coherence time decreases from about 366 s to 7 ms and from about 27 s to 0.3 ms, respectively, limited by the two mechanisms above. The calculated coherence times are at least one order longer than the observed ones at ~6.4 GHz qubit frequency, suggesting plenty of room for experimental improvement. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_20476 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Electron charge coherence on a solid neon surface Li, Xinhao Zou, Shan Chen, Qianfan Jin, Dafei Quantum Physics Recent experiments show ~0.1 ms coherence time for a single electron charge qubit on a solid neon surface. This remarkably long coherence time is believed to result from the intrinsic purity of solid neon as a qubit host. In this paper, we present theoretical studies on the decoherence mechanisms of an electron's charge (lateral motional) states on solid neon. At the typical experimental temperature of ~10 mK, the two main decoherence mechanisms are the phonon-induced displacement of neon surface and phonon-induced modulation of neon permittivity (dielectric constant). With a qubit frequency increasing from 1 GHz to 10 GHz, the charge coherence time decreases from about 366 s to 7 ms and from about 27 s to 0.3 ms, respectively, limited by the two mechanisms above. The calculated coherence times are at least one order longer than the observed ones at ~6.4 GHz qubit frequency, suggesting plenty of room for experimental improvement. |
| title | Electron charge coherence on a solid neon surface |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2507.20476 |