404 citations · 2.9k across the 51 of their papers we have counts for
18 papers · 1 filter
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…
Generation of current vortex by spin current in Rashba systems
Florian Lange, Satoshi Ejima, Junji Fujimoto +4
Employing unbiased large-scale time-dependent density-matrix renormalization-group simulations, we demonstrate the generation of a charge-current vortex via spin injection in the R…
Quantum-inspired search method for low-energy states of classical Ising Hamiltonians
Hiroshi Ueda, Yuichi Otsuka, Seiji Yunoki
We develop a quantum-inspired numerical procedure for searching low-energy states of a classical Hamiltonian composed of two-body fully-connected random Ising interactions and a ra…
Dirac electrons in the square lattice Hubbard model with a -wave pairing field: chiral Heisenberg universality class revisited
Yuichi Otsuka, Kazuhiro Seki, Sandro Sorella +1
We numerically investigate the quantum criticality of the chiral Heisenberg universality class with the total number of fermion components =8 in terms of the Gross-Neveu theory.…
Effect of on-site Coulomb repulsion on ferromagnetic fluctuations in heavily over-doped cuprates
Shingo Teranishi, Kazutaka Nishiguchi, Seiji Yunoki +1
We theoretically study ferromagnetic (FM) fluctuations that are experimentally observed in the heavily overdoped region of cuprate superconductors. To explore the origin of FM fluc…
Discretized quantum adiabatic process for free fermions and comparison with the imaginary-time evolution
Tomonori Shirakawa, Kazuhiro Seki, Seiji Yunoki
Motivated by recent progress of quantum technologies, we study a discretized quantum adiabatic process for a one-dimensional free fermion system described by a variational wave fun…