object
Twenty-qubit B&C phantom code
A fixed self-dual CSS code obtained by binarizing a ququart seed and encoding its binary pairs into four-qubit blocks. The frozen tableau is the executable boundary; broader phantom operations and realizations remain unsurveyed at T1.
Scoped completion
Completion belongs to an entity, not the whole page
eczoo-entity:stab_20_2_6#objectT1 — preserved
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: primary
At a glance
Executable-target parameters
form: object formal target: css formal target: small-code
Reference instances
| Instance | n | k | d |
|---|---|---|---|
| primary | n=20 verified | k=2 verified | d=6 verified |
Scientific scope
Source, page, and formal object are separate identities
Primary entity: eczoo-entity:stab_20_2_6#object. Formalization target: eczoo-entity:stab_20_2_6#object. Legacy vocabulary: exact code projection.
Source/entity binding: clean.