4 papers
Coherent errors, syndrome extraction and the Robustness of Magic in stabiliser codes
Enrico Bozzetto, Jonte R. Hance
Coherent errors leave stabiliser-code-encoded magic states in superpositions of syndrome sectors. We ask how much magic these coherent errors add, and whether syndrome extraction d…
Phase-Space Representations of Quantum Error-Correcting Codes
Enrico Bozzetto, Jonte R. Hance
We connect the structure theorem for quasiprobability representations to quantum error correction. For a code space invariant under a subgroup of an extended Weyl-Heisenberg group,…
Dissipation of Spekkens' Generalised Contextuality under Decoherence: The Classical Limit
Enrico Bozzetto, Jonte R. Hance
When does a decohering quantum system become classical? Generalised noncontextuality gives one criterion, for scenarios rich enough in preparations: a system is classical once its…
Warring Contextualities - Provably Classical vs Provably Nonclassical
Enrico Bozzetto, Jonte R. Hance
In the literature, there are two differing definitions of contextuality: Kochen and Specker's, and Spekkens' (or ``generalised''). However, researchers using one of these definitio…