Higher-group symmetry in finite gauge theory and stabilizer codes

M Barkeshli, YA Chen, PS Hsin, R Kobayashi - SciPost Physics, 2024 - scipost.org
A large class of gapped phases of matter can be described by topological finite group gauge
theories. In this paper, we show how such gauge theories possess a higher-group global …

Codimension-2 defects and higher symmetries in (3+ 1) D topological phases

M Barkeshli, YA Chen, SJ Huang, R Kobayashi… - SciPost Physics, 2023 - scipost.org
D topological phases of matter can host a broad class of non-trivial topological defects of
codimension-1, 2, and 3, of which the well-known point charges and flux loops are special …

Topological order, quantum codes, and quantum computation on fractal geometries

G Zhu, T Jochym-O'Connor, A Dua - PRX Quantum, 2022 - APS
We investigate topological order on fractal geometries embedded in n dimensions. We
consider the n-dimensional lattice with holes at all length scales the corresponding fractal …

The boundaries and twist defects of the color code and their applications to topological quantum computation

MS Kesselring, F Pastawski, J Eisert, BJ Brown - Quantum, 2018 - quantum-journal.org
The color code is both an interesting example of an exactly solved topologically ordered
phase of matter and also among the most promising candidate models to realize fault …

Three-dimensional surface codes: Transversal gates and fault-tolerant architectures

M Vasmer, DE Browne - Physical Review A, 2019 - APS
One of the leading quantum computing architectures is based on the two-dimensional (2D)
surface code. This code has many advantageous properties such as a high error threshold …

Non-Clifford and parallelizable fault-tolerant logical gates on constant and almost-constant rate homological quantum LDPC codes via higher symmetries

G Zhu, S Sikander, E Portnoy, AW Cross… - arXiv preprint arXiv …, 2023 - arxiv.org
We study parallel fault-tolerant quantum computing for families of homological quantum low-
density parity-check (LDPC) codes defined on 3-manifolds with constant or almost-constant …

Cross-Cap Defects and Fault-Tolerant Logical Gates in the Surface Code and the Honeycomb Floquet Code

R Kobayashi, G Zhu - PRX Quantum, 2024 - APS
We consider the Z 2 toric code, surface code, and Floquet code defined on a nonorientable
surface, which can be considered as families of codes extending Shor's nine-qubit code. We …

A fault-tolerant non-Clifford gate for the surface code in two dimensions

BJ Brown - Science advances, 2020 - science.org
Fault-tolerant logic gates will consume a large proportion of the resources of a two-
dimensional quantum computing architecture. Here we show how to perform a fault-tolerant …

Universal fault-tolerant quantum computing with stabilizer codes

P Webster, M Vasmer, TR Scruby, SD Bartlett - Physical Review Research, 2022 - APS
The quantum logic gates used in the design of a quantum computer should be both
universal, meaning arbitrary quantum computations can be performed, and fault-tolerant …

Symmetry-enriched topological order in tensor networks: Defects, gauging and anyon condensation

DJ Williamson, N Bultinck, F Verstraete - arXiv preprint arXiv:1711.07982, 2017 - arxiv.org
We study symmetry-enriched topological order in two-dimensional tensor network states by
using graded matrix product operator algebras to represent symmetry induced domain walls …