Electron charge coherence on a solid neon surface

Shan Feng Zou

doi:10.1088/2058-9565/ae4267

Electron charge coherence on a solid neon surface

2026-02-18

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DOI：10.1088/2058-9565/ae4267

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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 864 s to 24 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.

Keywords:

electron charge qubit

solid neon

coherence time

decoherence mechanisms

phonon-induced effects

Electron charge coherence on a solid neon surface

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