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5 papers
Biorthogonal Renormalization
Elisabet Edvardsson, J Lukas K König, Marcus Stålhammar
The biorthogonal formalism extends conventional quantum mechanics to the non-Hermitian realm. It has, however, been pointed out that the biorthogonal inner product changes with the…
Sensitivity of non-Hermitian systems
Elisabet Edvardsson, Eddy Ardonne
Understanding the extreme sensitivity of the eigenvalues of non-Hermitian Hamiltonians to the boundary conditions is of great importance when analyzing non-Hermitian systems, as it…
Phase Transitions and Generalized Biorthogonal Polarization in Non-Hermitian Systems
Elisabet Edvardsson, Flore K. Kunst, Tsuneya Yoshida +1
Non-Hermitian (NH) Hamiltonians can be used to describe dissipative systems, and are currently intensively studied in the context of topology. A salient difference between Hermitia…
Non-Hermitian extensions of higher-order topological phases and their biorthogonal bulk-boundary correspondence
Elisabet Edvardsson, Flore K. Kunst, Emil J. Bergholtz
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, comp…
Biorthogonal Bulk-Boundary Correspondence in Non-Hermitian Systems
Flore K. Kunst, Elisabet Edvardsson, Jan Carl Budich +1
Non-Hermitian systems exhibit striking exceptions from the paradigmatic bulk-boundary correspondence, including the failure of bulk Bloch band invariants in predicting boundary sta…