Physikalisches Kolloquium: Non‐Hermitian topological phenomena

Jul 20
July 20, 2022 12:00 pm - 1:00 pm
HH und Online via Zoom

Non‐Hermitian topological phenomena

While topological phases of matter have mostly been studied for closed,
Hermitian systems, a recent shift has been made towards considering these
phases in the context of non-Hermitian Hamiltonians, which form a useful
approach to describe dissipation. Such Hamiltonians may feature many exotic properties, which are radically different from their Hermitian counterparts, such as the generic appearance of exceptional points, a break down of the famed bulk-boundary correspondence, and the piling up of bulk states at the boundaries known as the non-Hermitian skin effect. In this talk, I will study these features in more detail, and discuss the appearance of exceptional points in the presence of symmetries. Additionally, I will show that even though the conventional bulk-boundary correspondence breaks down, it is possible to define a biorthogonal bulk-boundary correspondence by making use of biorthogonal quantum mechanics.

Sprecher: Dr. Flore Kunst, Max‐Planck‐Institut für die Physik des Lichts (MPL), Erlangen

Kontakt: Department Physik

Thema: Physikalisches Kolloquium SS 2022

Zoom-Meeting beitreten

Meeting-ID: 683 2175 0234
Kenncode: 059959
Schnelleinwahl mobil
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