Zobrazeno 1 - 10
of 23 672
pro vyhledávání: '"Ohira A"'
Autor:
Ohira, Toru
The separability of quantum systems, particularly in mixed states, remains a fundamental challenge in quantum mechanics. The Werner density matrix, a widely studied representation of bipartite mixed quantum systems, has provided valuable insights int
Externí odkaz:
http://arxiv.org/abs/2409.18495
Autor:
Gao, Bin, Chen, Tong, Liu, Chunxiao, Klemm, Mason L., Zhang, Shu, Ma, Zhen, Xu, Xianghan, Won, Choongjae, McCandless, Gregory T., Murai, Naoki, Ohira-Kawamura, Seiko, Moxim, Stephen J., Ryan, Jason T., Huang, Xiaozhou, Wang, Xiaoping, Chan, Julia Y., Cheong, Sang-Wook, Tchernyshyov, Oleg, Balents, Leon, Dai, Pengcheng
In magnetically ordered insulators, elementary quasiparticles manifest as spin waves - collective motions of localized magnetic moments propagating through the lattice - observed via inelastic neutron scattering. In effective spin-1/2 systems where g
Externí odkaz:
http://arxiv.org/abs/2408.15957
Autor:
Sakawa, Y., Ishihara, H., Ryazantsev, S. N., Alkhimova, M. A., Kumar, R., Kuramoto, O., Matsumoto, Y., Ota, M., Egashira, S., Nakagawa, Y., Minami, T., Sakai, K., Taguchi, T., Habara, H., Kuramitsu, Y., Morace, A., Abe, Y., Arikawa, Y., Fujioka, S., Kanasaki, M., Asai, T., Morita, T., Fukuda, Y., Pikuz, S., Pikuz, T., Ohira, Y., Doehl, L. N. K., Woolsey, N., Sano, T.
An experimental investigation of collisionless shock ion acceleration is presented using a multicomponent plasma and a high-intensity picosecond duration laser pulse. Protons are the only accelerated ions when a near-critical-density plasma is driven
Externí odkaz:
http://arxiv.org/abs/2408.13088
Autor:
Nishihara, Shin, Ohira, Toru
Among living organisms, there are species that change their patterns on their body surface during their growth process and those that maintain their patterns. Theoretically, it has been shown that large-scale species do not form distinct patterns. Ho
Externí odkaz:
http://arxiv.org/abs/2407.17217
Autor:
Kazuki, Kamiido, Yutaka, Ohira
In this work, we investigate collisionless shocks propagating in a relativistically hot unmagnetized electron-positron plasmas. We estimate the dissipation fraction at shocks in the relativistically hot plasma, showing that it is sufficiently large t
Externí odkaz:
http://arxiv.org/abs/2406.07244
Particle acceleration and magnetic field amplification by relativistic shocks in inhomogeneous media
Particle acceleration and magnetic field amplification in relativistic shocks propagating in inhomogeneous media are investigated by three-dimensional magnetohydrodynamical (MHD) simulations and test-particle simulations. The MHD simulations show tha
Externí odkaz:
http://arxiv.org/abs/2405.15138
Autor:
Ohira, Kenta, Ohira, Toru
In this study, we introduce and explore a delay differential equation that lends itself to explicit solutions in the Fourier-transformed space. Through the careful alignment of the initial function, we can construct a highly accurate solution to the
Externí odkaz:
http://arxiv.org/abs/2401.02027
Autor:
Ohira, Yutaka
We recently found that streaming cosmic rays (CRs) induce a resistive electric field that can accelerate secondary electrons produced by CR ionization. In this work, we study the evolution of the energy spectrum of secondary electrons by numerically
Externí odkaz:
http://arxiv.org/abs/2404.18513
Autor:
Kamijima, Shoma F., Ohira, Yutaka
We investigate the attainable maximum energy of particles accelerated in the core-collapse supernova remnant (SNR) shock propagating in the free wind region with the Parker-spiral magnetic field, current sheet, and the wind termination shock (WTS) by
Externí odkaz:
http://arxiv.org/abs/2403.17335
Autor:
Nishihara, Shin, Ohira, Toru
This study examines how patterns on mammal body surfaces change as they transition from juveniles to adults and with seasonal variations. Our previous research suggests that patterns formed in infancy may fade due to the growing domain effects, typic
Externí odkaz:
http://arxiv.org/abs/2403.05741