id:"swepub:oai:DiVA.org:su-198747"
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- Stålhammar, Marcus,1994-Stockholms universitet,Fysikum (author)
Classification of exceptional nodal topologies protected by PT symmetry
- Article/chapterEnglish2021
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- 2021-11-10
- American Physical Society (APS),2021
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- LIBRIS-ID:oai:DiVA.org:su-198747
- https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-198747URI
- https://doi.org/10.1103/physrevb.104.l201104DOI
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- Language:English
- Summary in:English
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Classification
Notes
- Exceptional degeneracies, at which both eigenvalues and eigenvectors coalesce, and parity-time (PT) symmetry, reflecting balanced gain and loss in photonic systems, are paramount concepts in non-Hermitian systems. We here complete the topological classification of exceptional nodal degeneracies protected by PT symmetry in up to three dimensions and provide simple example models whose exceptional nodal topologies include previously overlooked possibilities such as second-order knotted surfaces of arbitrary genus, third-order knots, and fourth-order points.
Subject headings and genre
- NATURVETENSKAP Fysik Den kondenserade materiens fysik hsv//swe
- NATURAL SCIENCES Physical Sciences Condensed Matter Physics hsv//eng
- Theoretical Physics
- teoretisk fysik
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- Bergholtz, Emil J.Stockholms universitet,Fysikum(Swepub:su)ejb (author)
- Stockholms universitetFysikum (creator_code:org_t)
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- In:Physical Review B: American Physical Society (APS)104:202469-99502469-9969
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