Sökning: "Maria Hermanns"
Hittade 5 avhandlingar innehållade orden Maria Hermanns.
1. Quasielectrons in Abelian and non-Abelian Quantum Hall States
Sammanfattning : Strongly correlated electron systems continue to attract a lot of interest. Especially two-dimensional electron systems have shown many surprising behaviours. A fascinating example is the quantum Hall effect, which arises when electrons are confined to two dimensions, subjected to a very large magnetic field, and cooled to very low temperatures. LÄS MER
2. Entanglement spectrum and the bulk polarization
Sammanfattning : In this Licentiate thesis we give a brief review on the topics of topologicalinsulator and superconductor phases, the modern theory of polarization andthe entanglement spectrum, with a focus on one- and two-dimensional systems.In the context of symmetry protected topological systems the bulk polarizationcan be a topological invariant which characterizes the topological phase. LÄS MER
3. Topology off the beaten path : From critical to non-Hermitian systems
Sammanfattning : A central topic in condensed matter research during the last decades has been the study and classification of topological phases of matter. Topological insulators in particular, a subset of symmetry protected topological phases, have been investigated for over a decade. LÄS MER
4. Topological Phases of Non-Hermitian physics
Sammanfattning : 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. LÄS MER
5. Abelian and non-abelian quantum Hall hierarchies
Sammanfattning : A core tenet of condensed matter physics has been that different phases of matter can be classified according to Landau's symmetry breaking paradigm. It has become clear, however, that phases of matter exist that are not distinguished by symmetry, but rather by topology. LÄS MER
