Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Okuyama, Manaka"'
Autor:
Okuyama, Manaka, Ohzeki, Masayuki
We study the random-field Ising model on a Dyson hierarchical lattice, where the interactions decay in a power-law-like form, $J(r)\sim r^{-\alpha}$, with respect to the distance. Without a random field, the Ising model on the Dyson hierarchical latt
Externí odkaz:
http://arxiv.org/abs/2410.11515
Autor:
Okuyama, Manaka, Ohzeki, Masayuki
Publikováno v:
J. Phys. A: Math. Theor. 58, 015003 (2024)
The interpolation method is a powerful tool for rigorous analysis of mean-field spin glass models, both with and without dilution. In this study, we show that the interpolation method can be applied to Ising spin glass models in one dimension, such a
Externí odkaz:
http://arxiv.org/abs/2406.14857
Autor:
Okuyama, Manaka, Ohzeki, Masayuki
We studied nonsparsely diluted mean-field models that differ from sparsely diluted mean-field models, such as the Viana--Bray model. We prove that the free energy of nonsparsely diluted mean-field models coincides exactly with that of the correspondi
Externí odkaz:
http://arxiv.org/abs/2406.13245
Autor:
Okuyama, Manaka, Ohzeki, Masayuki
Publikováno v:
J. Phys. Soc. Jpn. 93, 104706 (2024)
The critical inverse temperature of the mean-field approximation establishes a lower bound of the true critical inverse temperature in a broad class of ferromagnetic spin models. This is referred to as the mean-field bound for the critical temperatur
Externí odkaz:
http://arxiv.org/abs/2406.12728
Autor:
Okuyama, Manaka, Ohzeki, Masayuki
We investigate the effect of deterministic analog control errors in the time-dependent Hamiltonian on isolated quantum dynamics. Deterministic analog control errors are formulated as time-dependent operators in the Schrodinger equation. We give an up
Externí odkaz:
http://arxiv.org/abs/2301.13075
Autor:
Okuyama, Manaka, Ohzeki, Masayuki
Publikováno v:
J. Phys. A: Math. Theor. 56, 325003 (2023)
Recently, Mori [Phys. Rev. E 84, 031128 (2011)] has conjectured that the free energy of Ising spin glass models with the Kac potential in the non-additive limit, such as the power-law potential in the non-additive regime, is exactly equal to that of
Externí odkaz:
http://arxiv.org/abs/2301.13051
Autor:
Okuyama, Manaka, Ohzeki, Masayuki
Publikováno v:
J. Phys. Soc. Jpn. 92, 084002 (2023)
The Gibbs-Bogoliubov inequality states that the free energy of a system is always lower than that calculated by a trial function. In this study, we show that a counterpart of the Gibbs-Bogoliubov inequality holds on the Nishimori line for Ising spin-
Externí odkaz:
http://arxiv.org/abs/2208.12311
Publikováno v:
Phil. Trans. R. Soc. A. 381, 20210412 (2022)
We investigate the effect of stochastic control errors in the time-dependent Hamiltonian on isolated quantum dynamics. The control errors are formulated as time-dependent stochastic noise in the Schrodinger equation. For a class of stochastic control
Externí odkaz:
http://arxiv.org/abs/2009.11151
Autor:
Okuyama, Manaka, Ohzeki, Masayuki
Publikováno v:
J. Phys. Soc. Jpn. 92, 114001 (2023)
Geometric Brownian motion (GBM) is a standard model in stochastic differential equations. In this study, we consider a matrix-valued GBM with non-commutative matrices. Introduction of non-commutative matrices into the matrix-valued GBM makes it diffi
Externí odkaz:
http://arxiv.org/abs/2006.00201
Autor:
Okuyama, Manaka, Ohzeki, Masayuki
The Griffiths first and second inequalities have played an important role in the analysis of ferromagnetic models. In spin-glass models, although the counterpart of the Griffiths first inequality has been obtained, the counterpart of the Griffiths se
Externí odkaz:
http://arxiv.org/abs/2005.06757