Engineering a smooth dielectric layer with shallow etched wells can create deterministic single-electron traps on solid neon while keeping the qubit orbital splitting near the experimental value, per Schrödinger–Poisson simulations.
Fast coherent control of a charge qubit on solid neon with a spin-qubit-compatible resonator
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abstract
Electrons floating in vacuum provide a clean platform for quantum information processing owing to their isolation from material defects. In particular, electrons on solid neon have emerged as a promising qubit platform because of their potentially 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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quant-ph 1years
2026 1verdicts
CONDITIONAL 1representative citing papers
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Deterministic single-electron trapping on solid neon using engineered dielectric surface geometry
Engineering a smooth dielectric layer with shallow etched wells can create deterministic single-electron traps on solid neon while keeping the qubit orbital splitting near the experimental value, per Schrödinger–Poisson simulations.