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On adiabatic cycles of quantum spin systems
Ken Shiozaki
Motivated by the -spectrum proposal of unique gapped ground states by Kitaev, we study adiabatic cycles in gapped quantum spin systems from various perspectives. We give a few e…
Symmetry indicator in non-Hermitian systems
Ken Shiozaki, Seishiro Ono
Recently, topological phases in non-Hermitian systems have attracted much attention because non-Hermiticity sometimes gives rise to unique phases with no Hermitian counterparts. No…
Topological terms of (2+1)d flag-manifold sigma models
Ryohei Kobayashi, Yasunori Lee, Ken Shiozaki +1
We examine topological terms of d sigma models and their consequences in the light of classifications of invertible quantum field theories utilizing bordism groups. In parti…
Symmetry-based approach to nodal structures: Unification of compatibility relations and gapless point classifications
Seishiro Ono, Ken Shiozaki
Determination of the symmetry property of superconducting gaps has been a central issue in studies to understand the mechanisms of unconventional superconductivity. Although it is…