Relations

concatenation_of → repetition

Three length-three bit-flip repetition blocks are the physical symbols of a length-three phase-flip repetition code. At matrix level, H_Z is three block-diagonal copies of the open repetition parity matrix and H_X is the outer parity matrix expanded across complete inner blocks. This is a curated construction relation: the repository has no exact concatenation replay adapter, so this card deliberately omits a construction recipe instead of presenting the relation as verifier evidence.

References: shor1995scheme, gottesman1997stabilizer