Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Ohgoe, Takahiro"'
Autor:
Ohgoe, Takahiro, Iwakiri, Hokuto, Kohda, Masaya, Ichikawa, Kazuhide, Nakagawa, Yuya O., Valencia, Hubert Okadome, Koh, Sho
Understanding and predicting the properties of solid-state materials from first-principles has been a great challenge for decades. Owing to the recent advances in quantum technologies, quantum computations offer a promising way to achieve this goal.
Externí odkaz:
http://arxiv.org/abs/2307.14607
Autor:
Ohgoe, Takahiro, Hirayama, Motoaki, Misawa, Takahiro, Ido, Kota, Yamaji, Youhei, Imada, Masatoshi
Publikováno v:
Phys. Rev. B 101, 045124 (2020)
Understanding physics of high-$T_c$ cuprate superconductors remains one of the important problems in materials science. Though a number of diverse theories argue about the superconductivity and competing orders, ab initio and quantitative understandi
Externí odkaz:
http://arxiv.org/abs/1902.00122
Publikováno v:
Phys. Rev. B 99, 245155 (2019)
Three-types (three-band, two-band and one-band) of effective Hamiltonians for the HgBa$_2$CuO$_4$ and three-band effective Hamiltonian for La$_2$CuO$_4$ are derived beyond the level of the constrained-GW approximation combined with the self-interacti
Externí odkaz:
http://arxiv.org/abs/1901.00763
Publikováno v:
Phys. Rev. Lett. 121, 130405 (2018)
We demonstrate that summing up series of Feynman diagrams can yield unbiased accurate results for strongly-correlated fermions even when the convergence radius vanishes. We consider the unitary Fermi gas, a model of non-relativistic fermions in three
Externí odkaz:
http://arxiv.org/abs/1802.07717
Publikováno v:
Phys. Rev. B 97, 045138 (2018)
We study competitions between charge uniform and inhomogeneous states in two-dimensional Hubbard models by using a variational Monte Carlo method. At realistic parameters for cuprate superconductors, emergent effective attraction of carriers generate
Externí odkaz:
http://arxiv.org/abs/1712.05490
Autor:
Misawa, Takahiro, Morita, Satoshi, Yoshimi, Kazuyoshi, Kawamura, Mitsuaki, Motoyama, Yuichi, Ido, Kota, Ohgoe, Takahiro, Imada, Masatoshi, Kato, Takeo
Publikováno v:
Computer Physics Communications, Vol. 235, 447-462 (2019)
mVMC (many-variable Variational Monte Carlo) is an open-source software based on the variational Monte Carlo method applicable for a wide range of Hamiltonians for interacting fermion systems. In mVMC, we introduce more than ten thousands variational
Externí odkaz:
http://arxiv.org/abs/1711.11418
Publikováno v:
Sci. Adv. 3, e1700718 (2017)
Studies on out-of-equilibrium dynamics have paved a way to realize a new state of matter. Especially, superconductor-like properties above room temperatures recently suggested in copper oxides achieved by selectively exciting vibrational phonon modes
Externí odkaz:
http://arxiv.org/abs/1705.09466
Autor:
Ohgoe, Takahiro, Imada, Masatoshi
Publikováno v:
Phys. Rev. Lett. 119, 197001 (2017)
Using a variational Monte Carlo method, we study competitions of strong electron-electron and electron-phonon interactions in the ground state of Holstein-Hubbard model on a square lattice. At half filling, an extended intermediate metallic or weakly
Externí odkaz:
http://arxiv.org/abs/1703.08899
Publikováno v:
Phys. Rev. B 92, 245106 (2015)
We develop a time-dependent variational Monte Carlo (t-VMC) method for quantum dynamics of strongly correlated electrons. The t-VMC method has been recently applied to bosonic systems and quantum spin systems. Here, we propose a time-dependent trial
Externí odkaz:
http://arxiv.org/abs/1507.00274
Autor:
Ohgoe, Takahiro, Imada, Masatoshi
Publikováno v:
Phys. Rev. B 89, 195139 (2014)
We develop a variational Monte Carlo (VMC) method for electron-phonon coupled systems. The VMC method has been extensively used for investigating strongly correlated electrons over the last decades. However, its applications to electron-phonon couple
Externí odkaz:
http://arxiv.org/abs/1403.4150