collection
XZZX surface code
The planar XZZX surface code uses mixed X and Z checks on square faces, with truncated checks at its open edges. This T1 skeleton implements the distance-three specialization of the open patch in Figure 9 of the primary source. Its grid, boundary supports, and local Hadamard map to a CSS patch are fixed in the constructor and independently tested. Only this finite witness is verified; decoder, operation, and realization facets remain unsurveyed.
Scoped completion
Completion belongs to an entity, not the whole page
eczoo-entity:xzzx#collectionT1 — draft
Verified formal skeleton
The formal core and displayed claims are provenance-checked. Unlisted facets are not yet surveyed, not negative results.
One orienting visual
Orienting view
Inspect constructor-derived qubits, stabilizers, and logical paths without leaving the entry. Visual instance: d3-open
At a glance
Executable-target parameters
form: collection formal target: non-css
Reference instances
| Instance | n | k | d |
|---|---|---|---|
| d3-open | n=9 verified | k=1 verified | d=3 verified |
Scientific scope
Source, page, and formal object are separate identities
Primary entity: eczoo-entity:xzzx#collection. Formalization target: eczoo-entity:xzzx#collection. Legacy vocabulary: exact family projection.
Source/entity binding: clean.