Qubit ZooCurated map of Zoo entries in the Floating Electron family.
Entries
| Entry | Type | Status |
|---|---|---|
| electron-on-solid-neon-qubit | qubit | demonstrated |
Composition
- qubit: 1
Curated synthesis
This family currently has one experimentally demonstrated member: electron-on-solid-neon-qubit. Its logical states are quantized motional levels of an electron above an inert neon surface, so it should not be conflated with electron-spin qubits on helium or semiconductor charge qubits. Read it through jaynes-cummings-in-circuits and dispersive-readout-mechanism for the circuit-QED layer, then through charge-noise-sweet-spot for the central large-dipole/noise tradeoff.
Coupling-budget reading order
The useful circuit-QED comparison is a four-step chain, not just the statement that the electron couples to a resonator:
- vacuum-rms-field-scaling isolates the resonator-side resource: impedance and effective capacitance set the zero-point voltage available at the electron.
- The electron’s unusually large motional dipole combines with that field to produce the measured coupling ; jaynes-cummings-in-circuits is the effective model only after truncating the motional spectrum to a qubit.
- Detuning turns that coupling into the state-dependent shift used for measurement, which is the branch explained by dispersive-readout-mechanism.
- The same cavity admixture also opens a relaxation channel. purcell-protection-via-detuning explains why the entry’s reported long- bias point with reduced Purcell decay is part of the architecture tradeoff rather than an unrelated coherence detail.
This ordering keeps three knobs distinct: the resonator’s vacuum field, the electron’s dipole matrix element, and the chosen detuning. Together they determine whether stronger coupling buys faster readout, more cavity-induced decay, or both.
Coverage frontier
Future additions belong here only when the electron is physically suspended above a cryogenic surface. Electron-on-helium spin or motional qubits are the most obvious missing branch once a sufficiently mature, source-backed entry can be written; image-state electrons and semiconductor-confined carriers belong elsewhere.