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Weak-coupling quantum Monte Carlo calculations on the Keldysh contour: theory and application to the current-voltage characteristics of the Anderson model
Philipp Werner, Takashi Oka, Martin Eckstein +1
We present optimized implementations of the weak-coupling continuous-time Monte Carlo method defined for nonequilibrium problems on the Keldysh contour. We describe and compare two…
Tight-binding photonic bands in metallophotonic waveguide networks and flat bands in kagome lattices
Shimpei Endo, Takashi Oka, Hideo Aoki
We propose that we can realize "tight-binding photonic bands" in metallophotonic waveguide networks, where the photonic bound states localized around the crossings of a network for…
Photovoltaic Berry curvature in the honeycomb lattice
Takashi Oka, Hideo Aoki
Photovoltaic Hall effect -- the Hall effect induced by intense, circularly-polarized light in the absence of static magnetic fields -- has been proposed in Phys. Rev. B 79, 081406R…
Nonequilibrium magnetic and superconducting phases in the two-dimensional Hubbard model coupled to electrodes
Takashi Oka, Hideo Aoki
A theory is presented for a nonequilibrium phase transition in the two-dimensional Hubbard model coupled to electrodes. Nonequilibrium magnetic and superconducting phase diagram is…
Photo-induced Hall Effect in Graphene -- Effect of Boundary Types
Takashi Oka, Hideo Aoki
We theoretically predict, with the Keldysh Green's function combined with the Floquet method, that the AC electric field of a circularly polarized light should induce a Hall effect…
Dielectric Breakdown in a Mott Insulator: Many-body Schwinger-Landau-Zener Mechanism studied with a Generalized Bethe Ansatz
Takashi Oka, Hideo Aoki
The nonadiabatic quantum tunneling picture, which may be called the many-body Schwinger-Landau-Zener mechanism, for the dielectric breakdown of Mott insulators in strong electric f…