45 citations · 487 across the 36 of their papers we have counts for
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Phase transitions in the frustrated Ising ladder with stoquastic and nonstoquastic catalysts
Kabuki Takada, Shigetoshi Sota, Seiji Yunoki +3
The role of nonstoquasticity in the field of quantum annealing and adiabatic quantum computing is an actively debated topic. We study a strongly-frustrated quasi-one-dimensional qu…
Effect of phase string on single-hole dynamics in the two-leg Hubbard ladder
Kazuya Shinjo, Shigetoshi Sota, Takami Tohyama
Optical measurements in doped Mott insulators have discovered the emergence of spectral weights at mid-infrared (MIR) upon chemical doping and photodoping. MIR weights may have a r…
Resonating dimer-monomer liquid state in a magnetization plateau of a spin- kagome-strip Heisenberg chain
Katsuhiro Morita, Shigetoshi Sota, Takami Tohyama
Highly frustrated spin systems such as the kagome lattice (KL) are a treasure trove of new quantum states with large entanglements. We thus study the spin- Heisenberg…
Proximate Kitaev system for an intermediate magnetic phase in in-plane magnetic fields
Beom Hyun Kim, Shigetoshi Sota, Tomonori Shirakawa +2
Motivated by the magnetic phase transition of a proximate Kitaev system -RuCl in the presence of a magnetic field, we study the simplest but essential quantum spin model wit…
Spin Dynamics in the t-t'-J Model: Dynamical Density-Matrix Renormalization Group Study
Takami Tohyama, Shigetoshi Sota, Seiji Yunoki
The ground state of a hole-doped t-t'-J ladder with four legs favors a striped charge distribution. Spin excitation from the striped ground state is known to exhibit incommensurate…