Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Yoshifumi Hyakutake"'
Autor:
Yoshifumi Hyakutake, Kiyoto Maeyama
Publikováno v:
Universe, Vol 10, Iss 1, p 28 (2024)
We reconstruct type II supergravities by using building blocks of O(d)×O(d) invariants. These invariants are obtained by explicitly analyzing O(d)×O(d) transformations of 10 dimensional massless fields. Similar constructions are performed by employ
Externí odkaz:
https://doaj.org/article/84adb5a2e3f64b1da4d66f0e4c19aeaf
Autor:
Kazuho Hiraga, Yoshifumi Hyakutake
Publikováno v:
Universe, Vol 7, Iss 11, p 425 (2021)
In the early universe, it is important to take into account the quantum effect of gravity to explain the feature of inflation. In this paper, we consider the M-theory effective action which consists of 11-dimensional supergravity and (Weyl)4 terms. T
Externí odkaz:
https://doaj.org/article/77e596c7150c483693a045e45deae01a
Autor:
Kazuho Hiraga, Yoshifumi Hyakutake
Publikováno v:
Progress of Theoretical and Experimental Physics
We investigate the inflationary expansion of the universe induced by higher-curvature corrections in M-theory. The inflationary evolution of the geometry is discussed in K. Hiraga and Y. Hyakutake, Prog. Theor. Exp. Phys. 2018, 113B03 (2018), which w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::314a6a165ce8fd7464c448f11f3fb974
https://doi.org/10.1093/ptep/ptaa142
https://doi.org/10.1093/ptep/ptaa142
Autor:
Masanori Hanada1,2,3 hanada@yukawa.kyoto-u.ac.jp, Yoshifumi Hyakutake4, Goto Ishiki1, Jun Nishimura5,6
Publikováno v:
Science. 5/23/2014, Vol. 344 Issue 6186, p882-855. 4p.
Autor:
Kazuho Hiraga, Yoshifumi Hyakutake
We investigate inflationary cosmology by solving the effective action of the M-theory, which consists of the 11 dimensional supergravity and quartic terms of the Weyl tensor. The metric is simply expressed by two scale factors, one for the spatial di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bce23747cafe7e5542f7d1ad90416cd4
Autor:
Yoshifumi Hyakutake, Kazuho Hiraga
Publikováno v:
International Journal of Modern Physics A. 34:1930016
In this paper, we review inflationary cosmology in M-theory with quantum corrections. In old days the inflation was proposed as a resolution to the cosmological problems, and nowadays models of the inflation are severely restricted by the observation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b09a0e52ba9e234675c7cbbbaa46601
https://doi.org/10.1142/s0217751x19300163
https://doi.org/10.1142/s0217751x19300163
Autor:
Yoshifumi Hyakutake
Publikováno v:
Journal of High Energy Physics
One of important directions in superstring theory is to reveal the quantum nature of black hole. In this paper we embed Schwarzschild black hole into superstring theory or M-theory, which we call a smeared black hole, and resolve quantum corrections
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3656c1e819b18883ca7f42652f2f5044
http://repo.scoap3.org/api
http://repo.scoap3.org/api
Autor:
Yoshifumi Hyakutake
Publikováno v:
Modern Physics Letters A. 20:1859-1873
In this paper we review the properties of supertubes in type IIA superstring theory. The supertube is a tubular D2-brane which carries D0-brane charge N0, fundamental string charge N1 and angular momentum J. Even if we fix two charges N0, N1 and angu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e11b7d82098e4c1c49b3932ba83f3df
https://doi.org/10.1142/s0217732305017962
https://doi.org/10.1142/s0217732305017962
Publikováno v:
Nuclear Physics B. 712:115-138
We give a geometric interpretation of the entropy of the supertubes with fixed conserved charges and angular momenta in two different approaches using the DBI action and the supermembrane theory. By counting the geometrically allowed microstates, it
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::206d325f88d6c081357de3bf560b25b6
https://doi.org/10.1016/j.nuclphysb.2005.01.042
https://doi.org/10.1016/j.nuclphysb.2005.01.042
Publikováno v:
Nuclear Physics B. 696:251-262
We study possible deformations of BPS supertubes keeping their conserved charges fixed. We show that there is no flat direction to closed supertubes of circular cross section with uniform electric and magnetic fields, and also to open planar supertub
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0792561f22300127675810c8bc788e61
https://doi.org/10.1016/j.nuclphysb.2004.07.010
https://doi.org/10.1016/j.nuclphysb.2004.07.010