Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Flore K. Kunst"'
Autor:
Sharareh Sayyad, Flore K. Kunst
Publikováno v:
Physical Review Research, Vol 4, Iss 2, p 023130 (2022)
Exceptional points (EPs) appear as degeneracies in the spectrum of non-Hermitian matrices at which the eigenvectors coalesce. In general, an EP of order n may find room to emerge if 2(n−1) real constraints are imposed. Our results show that these c
Externí odkaz:
https://doaj.org/article/d7794cb4a4c04644a85edc0d70fbca43
Publikováno v:
Physical Review Research, Vol 2, Iss 4, p 043046 (2020)
Non-Hermitian (NH) Hamiltonians can be used to describe dissipative systems, notably including systems with gain and loss, and are currently intensively studied in the context of topology. A salient difference between Hermitian and NH models is the b
Externí odkaz:
https://doaj.org/article/0d142113c7554586ab91dc1babee02f5
Autor:
Fanny Terrier, Flore K. Kunst
Publikováno v:
Physical Review Research, Vol 2, Iss 2, p 023364 (2020)
Four-dimensional quantum Hall (QH) models usually rely on synthetic dimensions for their simulation in experiment. Here, we study a QH system which features a nontrivial configuration of three-dimensional Weyl cones on its boundaries. We propose a th
Externí odkaz:
https://doaj.org/article/388754a0a6144eab8361265a4be6d550
Publikováno v:
New Journal of Physics
arXiv: 2106.05030v1
arXiv: 2106.05030v1
Non-Hermitian Hamiltonians, which effectively describe dissipative systems,and analogue gravity models, which simulate properties of gravitationalobjects, comprise seemingly different areas of current research. Here, weinvestigate the interplay betwe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::978037286f6968a4f60f9d2001568033
https://hdl.handle.net/21.11116/0000-000D-2C40-A21.11116/0000-000A-0411-E21.11116/0000-000A-0413-C
https://hdl.handle.net/21.11116/0000-000D-2C40-A21.11116/0000-000A-0411-E21.11116/0000-000A-0413-C
Autor:
Flore K. Kunst, Alexander Moritz, Emil J. Bergholtz, Mohamed Bourennane, G. Andler, Ashraf Mohamed El Hassan
Publikováno v:
Nature Photonics. 13:697-700
The recently established paradigm of higher-order topological states of matter has shown that not only, as previously thought, edge and surface states but also states localised to corners can have robust and exotic properties. Here we report on the e
Publikováno v:
Reviews of Modern Physics
The current understanding of the role of topology in non-Hermitian (NH) systems and its far-reaching physical consequences observable in a range of dissipative settings are reviewed. In particular, how the paramount and genuinely NH concept of except
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bcbeebbf5b93b12f86983c945461bd9
https://hdl.handle.net/21.11116/0000-0008-31D8-D21.11116/0000-0008-31DA-B21.11116/0000-0008-31DB-A
https://hdl.handle.net/21.11116/0000-0008-31D8-D21.11116/0000-0008-31DA-B21.11116/0000-0008-31DB-A
Autor:
Flore K. Kunst, Fanny Terrier
Publikováno v:
Physical Review Research
Four-dimensional quantum Hall (QH) models usually rely on synthetic dimensions for their simulation in experiment. Here, we study a QH system which features a nontrivial configuration of three-dimensional Weyl cones on its boundaries. We propose a th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1b9b475ba9422ab51eabd209fb1289af
https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.2.023364
https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.2.023364
Publikováno v:
Physical Review B. 99
Non-Hermitian Hamiltonians, which describe a wide range of dissipative systems, and higher-order topological phases, which exhibit novel boundary states on corners and hinges, comprise two areas of intense current research. Here we investigate system
While the Bloch spectrum of translationally invariant noninteracting lattice models is trivially obtained by a Fourier transformation, diagonalizing the same problem in the presence of open boundary conditions is typically only possible numerically o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81024353890cc98196b10757fea44baf
http://arxiv.org/abs/1812.03099
http://arxiv.org/abs/1812.03099
Non-Hermitian systems exhibit striking exceptions from the paradigmatic bulk-boundary correspondence, including the failure of bulk Bloch band invariants in predicting boundary states and the (dis)appearance of boundary states at parameter values far
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f70a93bae59cc0458245c9983ced7d7
http://arxiv.org/abs/1805.06492
http://arxiv.org/abs/1805.06492