Zobrazeno 1 - 10
of 104
pro vyhledávání: '"Masahiko Higuchi"'
Publikováno v:
Journal of Physics Communications, Vol 8, Iss 4, p 045003 (2024)
From the viewpoint of the Bose–Einstein condensation (BEC) of the fermion system, the maximum geminal of the second-order reduced density matrix of the superconducting state exactly corresponds to the Cooper pair. In this paper the entanglement ent
Externí odkaz:
https://doaj.org/article/c8f0fa017d4340a88c7835eae624618b
Publikováno v:
Journal of Physics Communications, Vol 7, Iss 7, p 075003 (2023)
A finite-temperature current-density functional theory for bosonic superfluids (sf-CDFT) in the thermal equilibrium state is proposed herein. In the sf-CDFT, hydrodynamic physical quantities, such as particle number density, current density, and the
Externí odkaz:
https://doaj.org/article/7d6320d0e83f4b6fa599197f704cfdea
Publikováno v:
New Journal of Physics, Vol 24, Iss 10, p 103028 (2022)
We present the second-order phase transition from a band insulator to metal that is induced by a strong magnetic field. The magnetic-field dependences of the magnetization and energy band gap of a crystalline silicon immersed in a magnetic field are
Externí odkaz:
https://doaj.org/article/07a7ccec5d0e4cb1a36d3601648d6263
Autor:
Katsuhiko Higuchi, Masahiko Higuchi
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
Abstract Conditions for the N-representability of the pair density (PD) are needed for the development of the PD functional theory. We derive sufficient conditions for the N-representability of the PD that is calculated from the Jastrow wave function
Externí odkaz:
https://doaj.org/article/8b10874aec4f452a9bb1045810706932
Autor:
Katsuhiko Higuchi, Masahiko Higuchi
Publikováno v:
Physical Review B. 106
Autor:
Masahiko Higuchi, Katsuhiko Higuchi
We present the explicit forms of the maximum eigenvalue and the corresponding eigenfunction for the second-order reduced density matrix (RDM2) of the BCS superconducting state (SS). Using these quantities, we deal with two topics in the present paper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48c2a99a744a7f94362c4b3bd4917204
Publikováno v:
Physical Review B. 102
Quantitative prediction of the gap behavior via first-principles calculations has thus far been restricted to temperature dependence. Here, we present a gap equation developed based on the current-density functional theory for superconductors. This e
Publikováno v:
Physical Review A. 100
As a microscopic theory to express the electromagnetic response of the system to the external fields, we present the time-dependent current-density-functional theory (td-CDFT), taking into account the effect of the energy dissipation from the system.
Publikováno v:
Journal of Applied Physics. 130:124303
Graphene is a highly promising material in the field of spin electronics. Recent experiments on electron spin resonance have observed a reduction in the g-factor of graphene. In our previous paper [J. Phys. Soc. Jpn. 88, 094707 (2019)], we demonstrat
Publikováno v:
Physical Review B. 97
We propose a nonperturbative method to calculate the butterfly diagram of energy spectra for materials immersed in a magnetic field. We apply the proposed method to a crystalline silicon immersed in a magnetic field. It is shown that the conventional