Semiconducting MOC

Curated map of Zoo entries in the Semiconducting family.

Entries

Entry	Type	Status
aeon-qubit	qubit	active
exchange-only-qubit	qubit	active
hole-spin-qubit	qubit	demonstrated
hybrid-qubit	qubit	demonstrated
kane-qubit	qubit	demonstrated
rx-qubit	qubit	demonstrated
semiconductor-charge-qubit	qubit	demonstrated
silicon-spin-qubit	qubit	demonstrated
loss-divincenzo-qubit	qubit	demonstrated
singlet-triplet-qubit	qubit	active
spin-qubit	qubit	demonstrated

Composition

• qubit: 11

Conceptual anchors

• exchange-interaction-in-quantum-dots is the device-level primitive for the whole dot-defined branch: it explains where tunable $J$ actually comes from and why barrier control became the preferred route.
• heisenberg-exchange-in-quantum-dots is the algebraic companion note for the encoded-spin branch, where the main question is no longer how $J$ is made but what logical axis an exchange pulse implements.
• decoherence-free-subspace is the clean separator between simple one-spin / two-spin notes and the three-spin encoded branch.
• charge-noise-sweet-spot is the main cross-cutting lens for the whole family whenever electrical tunability starts pulling charge sensitivity back in.
• spin-orbit-coupling-for-qubit-control marks the main fork between electron-spin platforms that need synthetic gradients and hole-spin platforms that get direct electrical drive from strong SOC.

Curated synthesis

The highest-value organizing move in this family is to separate the single-spin baseline from the encoded-exchange ladder and from the charge-admixed side branches. Otherwise loss-divincenzo-qubit, singlet-triplet-qubit, exchange-only-qubit, rx-qubit, and aeon-qubit blur into “more spin qubits” when they are actually different answers to the same control-versus-noise problem.

1. The baseline branch is local-spin-first

   • loss-divincenzo-qubit is the minimal recipe: one spin per dot, exchange for entangling gates, and extra engineering for fast one-qubit control.
   • spin-qubit and silicon-spin-qubit should stay as umbrella notes for the broader modality and materials trajectory, not absorb the encoded-spin descendants.

2. The encoded-exchange ladder adds symmetry structure step by step

   • singlet-triplet-qubit is the first compression move: two spins, one encoded qubit, exchange as a logical splitting instead of only a two-qubit gate primitive.
   • exchange-only-qubit pushes that idea into a true three-spin encoded subsystem, removing the need for microwave drive or field gradients at the price of more elaborate pulse geometry.
   • rx-qubit keeps the three-spin encoding but moves into an always-on, resonantly driven regime to gain a sweet-spot operating mode and cavity-friendly control.
   • aeon-qubit is the endpoint of this local ladder: keep exchange always on, stay at a double sweet spot, and turn barrier-gate tuning into the main control surface.
   • Read this whole branch by alternating between exchange-interaction-in-quantum-dots for the physical origin of $J$ and heisenberg-exchange-in-quantum-dots for the logical action of that coupling after projection.

3. The side branches are different compromises, not incomplete versions of the ladder

   • semiconductor-charge-qubit and hybrid-qubit buy speed by re-admitting charge character into the qubit itself.
   • hole-spin-qubit uses strong intrinsic SOC to make electrical control native rather than synthetic.
   • kane-qubit is the donor-spin branch, where atomic placement and hyperfine control replace lithographic quantum-dot tuning as the defining resource.

Routing rule: when to enter which note

• Enter spin-qubit or silicon-spin-qubit when the question is platform-level competitiveness, fabrication trajectory, or the overall semiconductor pitch.
• Enter loss-divincenzo-qubit when you want the cleanest “single spin + exchange” template.
• Enter singlet-triplet-qubit, exchange-only-qubit, rx-qubit, and aeon-qubit as a sequence when the real comparison is how much encoding and sweet-spot structure is being introduced to civilize exchange control.
• Enter semiconductor-charge-qubit, hybrid-qubit, or hole-spin-qubit when the main tradeoff is faster electrical control versus renewed charge sensitivity.
• For semiconductor descendants that cross fully into Josephson-circuit territory, continue in super-semi-moc.