Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Okumura, Shun"'
Topological spin textures exhibit a hierarchical nature. For instance, magnetic skyrmions, which possess a particle-like nature, can aggregate to form superstructures such as skyrmion strings and skyrmion lattices. Magnetic hopfions are also regarded
Externí odkaz:
http://arxiv.org/abs/2411.00396
The magnetic solitons such as chiral solitons, magnetic skyrmions, and magnetic hopfions, exhibiting particlelike nature widely emerge in magnets depending on spatial dimension. As their number directly gives rise to an impact on magnetic properties
Externí odkaz:
http://arxiv.org/abs/2409.10842
We theoretically study nonlinear processes driven by a DC spin-electric field in the antiferromagnetic spin-1 Heisenberg model starting from the ground state in the Haldane phase. The DC spin-electric field generates finite spin current and accumulat
Externí odkaz:
http://arxiv.org/abs/2409.09578
We study Dirac fermions in the presence of a space-dependent chiral gauge field and thermodynamic gradients, establishing a connection to the inverse spin Hall effect. The chiral gauge field induces a chiral magnetic field, resulting in a surface Fer
Externí odkaz:
http://arxiv.org/abs/2409.09025
Current-driven dynamics of spin textures plays a pivotal role in potential applications for electronic devices. While two-dimensional magnetic skyrmions with topologically nontrivial spin textures have garnered significant interest, their practical u
Externí odkaz:
http://arxiv.org/abs/2407.02983
Despite proposing a quantum generative model for time series that successfully learns correlated series with multiple Brownian motions, the model has not been adapted and evaluated for financial problems. In this study, a time-series generative model
Externí odkaz:
http://arxiv.org/abs/2405.11795
Topological flat bands have gained extensive interest as a platform for exploring the interplay between nontrivial band topology and correlation effects. In recent studies, strongly correlated phenomena originating from a topological flat band were d
Externí odkaz:
http://arxiv.org/abs/2405.06287
Publikováno v:
Phys. Rev. B 110, 125111 (2024)
High harmonic generation (HHG) is a striking phenomenon, which reflects the ultrafast dynamics of electrons. Recently, it has been demonstrated that HHG can be used to reconstruct not only the energy band structure but also the geometric structure ch
Externí odkaz:
http://arxiv.org/abs/2405.01351
Autor:
Okumura, Shun, Ohzeki, Masayuki
We show the relationship between the Fourier coefficients and the barren plateau problem emerging in parameterized quantum circuits. In particular, the sum of squares of the Fourier coefficients is exponentially restricted concerning the qubits under
Externí odkaz:
http://arxiv.org/abs/2309.06740
The emergent electric field (EEF) is a fictitious electric field acting on conduction electrons through the Berry phase mechanism. The EEF is generated by the dynamics of noncollinear spin configurations and becomes nonzero even in one dimension. Alt
Externí odkaz:
http://arxiv.org/abs/2307.08017