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.