Related papers: Floquet codes with a twist

Floquet codes with a twist

URL: http://arxiv.org/abs/2306.08027v3
Date: Tue, 19 Sep 2023 20:43:26 GMT
Title: Floquet codes with a twist
Authors: Tyler D. Ellison, Joseph Sullivan, Arpit Dua
Abstract summary: We describe a method for creating twist defects in the honeycomb Floquet code of Hastings and Haah. We argue that the twist defects can be used to store and process quantum information fault tolerantly.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: We describe a method for creating twist defects in the honeycomb Floquet code of Hastings and Haah. In particular, we construct twist defects at the endpoints of condensation defects, which are built by condensing emergent fermions along one-dimensional paths. We argue that the twist defects can be used to store and process quantum information fault tolerantly, and demonstrate that, by preparing twist defects on a system with a boundary, we obtain a planar variant of the $\mathbb{Z}_2$ Floquet code. Importantly, our construction of twist defects maintains the connectivity of the hexagonal lattice, requires only 2-body measurements, and preserves the three-round period of the measurement schedule. We furthermore generalize the twist defects to $\mathbb{Z}_N$ Floquet codes defined on $N$-dimensional qudits. As an aside, we use the $\mathbb{Z}_N$ Floquet codes and condensation defects to define Floquet codes whose instantaneous stabilizer groups are characterized by the topological order of certain Abelian twisted quantum doubles.

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