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of 19
pro vyhledávání: '"Rødland, Lukas"'
Despite their ubiquity, systematic characterization of multifold exceptional points, $n$-fold exceptional points (EP$n$s), remains a significant unsolved problem. In this article, we characterize Abelian topology of eigenvalues for generic EP$n$s and
Externí odkaz:
http://arxiv.org/abs/2409.09153
We study the effect of disorder on Z$_2$ quantum spin liquids with a Majorana Fermi line (respectively surface in three dimensions) and show that depending on the symmetries that are preserved \emph{on average} qualitatively different scenarios will
Externí odkaz:
http://arxiv.org/abs/2402.01448
Autor:
Yang, Kang, Li, Zhi, König, J. Lukas K., Rødland, Lukas, Stålhammar, Marcus, Bergholtz, Emil J.
Publikováno v:
Rep. Prog. Phys. 87 078002 (2024)
Non-Hermitian matrices are ubiquitous in the description of nature ranging from classical dissipative systems, including optical, electrical, and mechanical metamaterials, to scattering of waves and open quantum many-body systems. Seminal line-gap an
Externí odkaz:
http://arxiv.org/abs/2309.14416
Autor:
Rødland, Lukas
Non-Hermitian physics has introduced phenomena like the skin effect and exceptional points, challenging traditional views of topological phases. This thesis contrasts two classification frameworks for non-Hermitian systems. The first approach employs
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-223643
Publikováno v:
SciPost Phys. 15, 200 (2023)
One of the unique features of non-Hermitian~(NH) systems is the appearance of non-Hermitian degeneracies known as exceptional points~(EPs). The extensively studied defective EPs occur when the Hamiltonian becomes non-diagonalizable. Aside from this d
Externí odkaz:
http://arxiv.org/abs/2204.13945
The entanglement spectrum is a useful tool to study topological phases of matter, and contains valuable information about the ground state of the system. Here, we study its properties for free non-Hermitian systems for both point-gapped and line-gapp
Externí odkaz:
http://arxiv.org/abs/2111.07788
Publikováno v:
New J. Phys. 25 043012 (2023)
Non-Hermitian Hamiltonians, which effectively describe dissipative systems, and analogue gravity models, which simulate properties of gravitational objects, comprise seemingly different areas of current research. Here, we investigate the interplay be
Externí odkaz:
http://arxiv.org/abs/2106.05030
Publikováno v:
SciPost Phys. 7, 019 (2019)
We extend the list of known band structure topologies to include a large family of hyperbolic nodal links and knots, occurring both in conventional Hermitian systems where their stability relies on discrete symmetries, and in the dissipative non-Herm
Externí odkaz:
http://arxiv.org/abs/1905.05858
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