Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Ken N. Okada"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-15 (2024)
Abstract Quantum approximate optimization algorithm (QAOA) is a promising hybrid quantum-classical algorithm to solve combinatorial optimization problems in the era of noisy intermediate-scale quantum computers. Recently it has been revealed that war
Externí odkaz:
https://doaj.org/article/c7705909b6794f85a070044e827c6523
Publikováno v:
Physical Review Research, Vol 5, Iss 4, p 043217 (2023)
The variational quantum eigensolver (VQE) is regarded as a promising candidate of hybrid quantum-classical algorithms for near-term quantum computers. Meanwhile, VQE is confronted with a challenge that statistical error associated with measurement as
Externí odkaz:
https://doaj.org/article/83147974b82446719b1e5f36c9610ff0
Autor:
Ken N. Okada, Youtarou Takahashi, Masataka Mogi, Ryutaro Yoshimi, Atsushi Tsukazaki, Kei S. Takahashi, Naoki Ogawa, Masashi Kawasaki, Yoshinori Tokura
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-6 (2016)
Quantized magnetoelectric coupling, which induces exotic magneto-optical phenomena, awaits to be evidenced in topological insulators. Here, Okada et al. demonstrate Faraday and Kerr rotations of magnetic topological insulator surfaces in quantum anom
Externí odkaz:
https://doaj.org/article/965e44c1d3cc4b8db1ae034ee1d74a35
We theoretically study magnetoelectric effects in a heterostructure of a generic band insulator and a ferromagnet. In contrast to the kinetic magnetoelectric effect in metals, referred to as the Edelstein effect or the inverse spin galvanic effect, o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d880c51600c5d457269a826f5e34fa96
http://arxiv.org/abs/1902.04204
http://arxiv.org/abs/1902.04204
Autor:
Atsushi Tsukazaki, Yoshinori Tokura, Ken N. Okada, Masataka Mogi, Naoki Ogawa, Kei S. Takahashi, Youtarou Takahashi, Masashi Kawasaki, Ryutaro Yoshimi
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-6 (2016)
Nature Communications
Nature Communications
Electrodynamic responses from three-dimensional topological insulators are characterized by the universal magnetoelectric term constituent of the Lagrangian formalism. The quantized magnetoelectric coupling, which is generally referred to as topologi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b1c7378be8ff3384e808bfca738e208
https://doaj.org/article/965e44c1d3cc4b8db1ae034ee1d74a35
https://doaj.org/article/965e44c1d3cc4b8db1ae034ee1d74a35
We study magnetic textures realized in noncentrosymmetric Kondo lattice models, in which localized magnetic moments weakly interact with itinerant electrons subject to Rashba and Dresselhaus spin-orbit couplings. By virtue of state-of-the-art numeric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::988827f00675f1c70f1ec71732607703
http://arxiv.org/abs/1809.07582
http://arxiv.org/abs/1809.07582
Autor:
Atsushi Tsukazaki, Ryutaro Yoshimi, Kei S. Takahashi, Yoshinori Tokura, Ken N. Okada, Naoki Ogawa, Masashi Kawasaki
We achieve the enhancement of the circular photogalvanic effect arising from the photoinjection of spins in topological insulator thin films by tuning the Fermi level $({E}_{\mathrm{F}})$. A series of ${({\mathrm{Bi}}_{1\ensuremath{-}x}{\mathrm{Sb}}_
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d9dbcf80a58310fc4bb92bd32516b900
Publikováno v:
Physical Review B. 47:6203-6206
We have calculated the Ni 3p x-ray photoemission spectrum (XPS) in ${\mathrm{NiCl}}_{2}$, taking into account the lifetime of Ni 3p hole states due to the ${\mathit{M}}_{2,3}$${\mathit{M}}_{4,5}$${\mathit{M}}_{4,5}$ super-Coster-Kronig decay process.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::408f7ad308fb7fa158ecf7df67858892
https://doi.org/10.1103/physrevb.47.6203
https://doi.org/10.1103/physrevb.47.6203