Flexible fault-tolerant gate gadgets
Phys. Rev. A 113, 022421 – Published 17 February, 2026
DOI: https://doi.org/10.1103/v37p-4yth
Abstract
We design flexible fault-tolerant gate gadgets that allow the data and the ancilla to be encoded using different codes. By picking a stabilizer code for the ancilla we are able to perform both Clifford and non-Clifford gates fault tolerantly on generic quantum codes, including both for stabilizer codes and, assuming the availability of suitable FT error-correction or measurement gadgets, for nonadditive codes. This allows us to demonstrate the first universal fault-tolerant gate set for nonadditive codes at the level of logical circuits. We consider fault tolerance with respect to both a dephasing channel and a depolarizing channel.
