3 papers
cond-mat.mes-hall2026
Steady-state skin effect in bosonic topological edge states under parametric driving
Nobuyuki Okuma
Non-Hermitian systems have attracted significant theoretical interest due to their extreme properties. However, realizations have mostly been limited to classical applications or a…
cond-mat.str-el2025
Topological two-body interaction obstructing trivial ground states: an indicator of fractional Chern insulators
Nobuyuki Okuma, Tomonari Mizoguchi
The search for candidate materials for fractional Chern insulators (FCIs) has mainly focused on the topological and geometrical structures of single-particle Chern bands. However,…
cond-mat.str-el2025
Biorthogonal basis approach to fractional Chern physics
Nobuyuki Okuma
A fractional Chern insulator is thought to emerge from the competition between one-particle band topology and strong repulsive interactions. As an attempt to study lattice models o…