A charge qubit on solid neon in a spin-qubit compatible circuit QED platform

• URL: http://arxiv.org/abs/2605.31185v1
• Date: Fri, 29 May 2026 11:54:34 GMT
• Title: A charge qubit on solid neon in a spin-qubit compatible circuit QED platform
• Abstract summary: electrons on solid neon have emerged as a promising qubit platform for its long coherence times.<n>We couple a single electron on solid neon to a magnetic-field-compatible superconducting NbTiN nanowire resonator.<n>We realize a charge qubit and demonstrate microwave readout and coherent control, with Rabi frequencies up to 76 MHz.
• Score: 0.25192356000188076
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Electrons floating in vacuum provide a clean platform for quantum information processing due to their isolation from material defects; electrons on solid neon have emerged as a promising qubit platform for its long coherence times. Here, toward spin-qubit realization, we couple a single electron on solid neon to a magnetic-field-compatible superconducting NbTiN nanowire resonator. We realize a charge qubit and demonstrate microwave readout and coherent control, with Rabi frequencies up to 76 MHz, an order of magnitude larger than in previous studies. Under strong driving, we observe a qubit frequency shift from nonlinear interactions with the intense microwave field. Deterministic electron trapping at an intended position remains challenging due to solid neon surface roughness; we characterize the electron's position from its differential coupling to distinct electrodes. Although not trapped at an intended position, our estimates indicate that spin-qubit demonstrations remain feasible.

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