Sökning: "Non-Hermitian systems"
Visar resultat 11 - 12 av 12 avhandlingar innehållade orden Non-Hermitian systems.
11. Solvable Topological Boundaries
Sammanfattning : The hallmark of topological phases of matter is the presence of robust boundary states. In this dissertation, a formalism is developed with which analytical solutions for these states can be straightforwardly obtained by making use of destructive interference, which is naturally present in a large family of lattice models. LÄS MER
12. Knotted Nodal Band Structures
Sammanfattning : It is well known that in conventional three dimensional (3D) Hermitian two band models, the intersections between the energy bands are generically given by points. The typical example are Weyl semimetals, where these singular points can be effectively described as Weyl fermions in the low energy regime. LÄS MER
