RT Journal Article T1 Quantum error correction with the semion code A1 Dauphinais, Guillaume A1 Ortíz Martín, Laura A1 Varona Angulo, Santiago A1 Martín-Delgado Alcántara, Miguel Ángel AB We present a full quantum error correcting procedure with the semion code: an off-shell extension of the double-semion model. We construct open-string operators that recover the quantum memory from arbitrary errors and closed-string operators that implement the basic logical operations for information processing. Physically, the new open-string operators provide a detailed microscopic description of the creation of semions at their end-points. Remarkably, topological properties of the string operators are determined using fundamental properties of the Hamiltonian, namely, the fact that it is composed of commuting local terms squaring to the identity. In all, the semion code is a topological code that, unlike previously studied topological codes, it is of non-CSS type and fits into the stabilizer formalism. This is in sharp contrast with previous attempts yielding non-commutative codes. PB IOP publishing ltd SN 1367-2630 YR 2019 FD 2019-05-29 LK https://hdl.handle.net/20.500.14352/13425 UL https://hdl.handle.net/20.500.14352/13425 LA eng NO © 2019 IOP publishing ltd.We thank Fiona Burnell and Juan Miguel Nieto for helpful discussions. We acknowledge financial support from the Spanish MINECO grants FIS2012-33152, FIS2015-67411, and the CAM research consortium QUITEMAD +, Grant No. S2013/ICE-2801. The research of MAM-D has been supported in part by the US Army Research Office through Grant No. W911N F-14-1-0103. SV thanks FPU MECD Grant. NO Ministerio de Economía y Competitividad (MINECO) NO Comunidad de Madrid NO FPU MECD Grant DS Docta Complutense RD 10 abr 2025