Bulk-Boundary Correspondence in Point-Gap Topological Phases

Explore the intricacies of bulk-boundary correspondence in point-gap topological phases through this 52-minute lecture by Masatoshi Sato from PCS Institute for Basic Science. Delve into the unique characteristics of non-Hermitian systems, focusing on the two distinct types of topology: line-gap and point-gap. Examine the fundamental principle of bulk-boundary correspondence in line-gap topology and investigate its role in point-gap topology. Uncover the requirements for point-gap topology in open boundary conditions and understand how it can differ from periodic boundary conditions. Learn about the complete classification of open boundary point-gap topology with symmetry and discover how non-trivial open boundary topology leads to robust and exotic surface states. Gain insights from the research presented in the referenced work by D. Nakamura, T. Bessho, and M. Sato.

Masatoshi Sato: Bulk-boundary correspondence in point-gap topological phases