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pro vyhledávání: '"topological degeneracy"'
Autor:
Heung, Tsz Fung, Franz, Marcel
The notion of topological order (TO) can be defined through the characteristic ground state degeneracy of a system placed on a manifold with non-zero genus $g$, such as a torus. This ground state degeneracy has served as a key tool for identifying TO
Externí odkaz:
http://arxiv.org/abs/2411.17964
Autor:
Sattler, Alexander, Daghofer, Maria
Publikováno v:
Phys. Rev. B 110, 024404, 2024
Both the Haldane spin chain and a topologically dimerized chain feature topologically protected edge states that are expected to be robust against some kind of noise. To elucidate whether it might be feasible to create such edge states in dimerized c
Externí odkaz:
http://arxiv.org/abs/2402.02813
The interplay between a topological degeneracy and the residue degeneracy (also known as the residue entropy) of quantum criticality remains as an important but not thoroughly understood topic. We find that this topological degeneracy, provided by a
Externí odkaz:
http://arxiv.org/abs/2303.11152
Akademický článek
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Autor:
Zhang, K. L., Song, Z.
Publikováno v:
Phys. Rev. B 101, 245152 (2020)
The ground-state degeneracy of the quantum spin system is a characteristic of nontrivial topology, when it is gapped and robust against disordered perturbation. The corresponding quantum phase transition (QPT) is usually driven by a real parameter. W
Externí odkaz:
http://arxiv.org/abs/2003.08029
Publikováno v:
Phys. Rev. B 104, 035110 (2021)
Orthorhombic CuMnAs has been proposed as an antiferromagnetic semimetal hosting nodal line and Dirac points around the Fermi level. We investigate relations between the topological bands and transport phenomena, i.e. spin Hall effect and anomalous Ha
Externí odkaz:
http://arxiv.org/abs/2104.13704
Autor:
Okuma, Nobuyuki
The interband effect is an important concept both in traditional and modern solid-state physics. In this paper, we present a theory of the nontrivial interband effect, which cannot be removed without breaking given rules. We define the general nontri
Externí odkaz:
http://arxiv.org/abs/2103.13281
Publikováno v:
Nanophotonics, Vol 12, Iss 19, Pp 3807-3815 (2023)
Synthetic frequency dimensions provide important opportunities to investigate novel topological phenomena. Previously, many theoretical proposals have been studied and relevant experiments have been performed very recently. However, all these works c
Externí odkaz:
https://doaj.org/article/fc638013893543f98a04507a01f8ec6d
Publikováno v:
Phys. Rev. B 101, 144439 (2020)
In this paper, with the help of Hermitian/non-Hermitian dynamic strings, the theory of non-Hermitian topological order is developed based on a non-Hermitian Wen-plaquette model. The effective models for bosonic topological excitations (e-particle and
Externí odkaz:
http://arxiv.org/abs/1907.06699
Autor:
Bergamin, Riccardo
We extend the analysis of the Vafa $\mathcal{N}=4$ SUSY model of FQHE and discuss other observables which characterize the FQHE topological order. We consider in particular the braiding properties of quasi-holes with generic charge. As one naturally
Externí odkaz:
http://arxiv.org/abs/1912.10868