2 papers
cond-mat.stat-mech2026
Conserved quantities in a bosonic tight-binding chain with non-Hermitian quartic terms
Tetsuya Iwasaki, Hosho Katsura
We investigate local conserved quantities in non-Hermitian bosonic lattice systems whose underlying Yang--Baxter structure remains unclear. Focusing on a one-dimensional bosonic ch…
cond-mat.str-el2026
Nonlinear Drude weight of the one-dimensional Hubbard model
Tetsuya Iwasaki, Hosho Katsura
We investigate nonlinear Drude weights (NLDWs) in the one-dimensional repulsive Hubbard model at zero temperature by combining exact Bethe-ansatz calculations with low-energy effec…