Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Uchida, Kento"'
Discrete and mixed-variable optimization problems have appeared in several real-world applications. Most of the research on mixed-variable optimization considers a mixture of integer and continuous variables, and several integer handlings have been d
Externí odkaz:
http://arxiv.org/abs/2408.13046
The majority of theoretical analyses of evolutionary algorithms in the discrete domain focus on binary optimization algorithms, even though black-box optimization on the categorical domain has a lot of practical applications. In this paper, we consid
Externí odkaz:
http://arxiv.org/abs/2407.07388
The covariance matrix adaptation evolution strategy (CMA-ES) is a powerful optimization method for continuous black-box optimization problems. Several noise-handling methods have been proposed to bring out the optimization performance of the CMA-ES o
Externí odkaz:
http://arxiv.org/abs/2405.11471
In several real-world applications in medical and control engineering, there are unsafe solutions whose evaluations involve inherent risk. This optimization setting is known as safe optimization and formulated as a specialized type of constrained opt
Externí odkaz:
http://arxiv.org/abs/2405.10534
Black-box optimization problems often require simultaneously optimizing different types of variables, such as continuous, integer, and categorical variables. Unlike integer variables, categorical variables do not necessarily have a meaningful order,
Externí odkaz:
http://arxiv.org/abs/2405.09962
Autor:
Watanabe, Yohei, Uchida, Kento, Hamano, Ryoki, Saito, Shota, Nomura, Masahiro, Shirakawa, Shinichi
The covariance matrix adaptation evolution strategy (CMA-ES) is an efficient continuous black-box optimization method. The CMA-ES possesses many attractive features, including invariance properties and a well-tuned default hyperparameter setting. Mor
Externí odkaz:
http://arxiv.org/abs/2305.00849
Publikováno v:
Phys. Rev. Lett. 129, 157401 (2022)
We reveal the crucial effect of strong spin-charge coupling on high-harmonic generation (HHG) in Mott insulators. In a system with antiferromagnetic correlations, the HHG signal is drastically enhanced with decreasing temperature, even though the gap
Externí odkaz:
http://arxiv.org/abs/2203.01029
Floquet engineering of electronic systems is a promising way of controlling quantum material properties on an ultrafast time scale. So far, the energy structure of Floquet states in solids has been observed through time and angle-resolved photoelectr
Externí odkaz:
http://arxiv.org/abs/2202.13315
Autor:
Nagai, Kohei, Uchida, Kento, Kusaba, Satoshi, Endo, Takahiko, Miyata, Yasumitsu, Tanaka, Koichiro
High harmonic generation (HHG) in solids reflects the underlying nonperturbative nonlinear dynamics of electrons in a strong light field and is a powerful tool for ultrafast spectroscopy of electronic structures. Photo-carrier doping allows us to und
Externí odkaz:
http://arxiv.org/abs/2112.12951
Autor:
Nishidome, Hiroyuki, Nagai, Kohei, Uchida, Kento, Ichinose, Yota, Yomogida, Yohei, Tanaka, Koichiro, Yanagi, Kazuhiro
Publikováno v:
Nano Lett. 20 (2020) 6215-6221
High-harmonic generation (HHG), which is generation of multiple optical harmonic light, is an unconventional nonlinear optical phenomenon beyond perturbation regime. HHG, which was initially observed in gaseous media, has recently been demonstrated i
Externí odkaz:
http://arxiv.org/abs/2004.11000