Entry facet
Use cases & realizations
Where the code fits and what has been demonstrated.
Use cases & fit
Platforms: long-range-connected-quantum-register routed-qldpc-syndrome-architecture
Tasks: constant-rate-quantum-memory-theory expansion-certified-decoder-research nongeometric-qldpc-fault-tolerance
Physical realizations
non-geometrically-local qLDPC fault-tolerance architecture proposed
A theoretical constant-overhead scheme combines quantum-expander recovery with encoded ancillas and fault-tolerant scheduling. Geometric measurement bounds show why sparse checks alone do not supply a shallow two-dimensional local circuit. No repeated-syndrome laboratory realization of the exact family was found as of 2026-08-09.
References: fawzi2018constant, delfosse2021measurement