Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Ohashi, Junko"'
Publikováno v:
JCAP 03 (2014) 052
We place observational likelihood constraints on braneworld and non-commutative inflation for a number of inflaton potentials, using Planck, WMAP polarization and BAO data. Both braneworld and non-commutative scenarios of the kind considered here are
Externí odkaz:
http://arxiv.org/abs/1310.5186
Publikováno v:
Phys. Rev. D 88, 103517 (2013)
It is known that power-law k-inflation can be realized for the Lagrangian $P=Xg(Y)$, where $X=-(\partial \phi)^2/2$ is the kinetic energy of a scalar field $\phi$ and $g$ is an arbitrary function in terms of $Y=Xe^{\lambda \phi/M_{pl}}$ ($\lambda$ is
Externí odkaz:
http://arxiv.org/abs/1310.3053
Publikováno v:
JCAP12(2013)009
We study observational signatures of two classes of anisotropic inflationary models in which an inflaton field couples to (i) a vector kinetic term F_{mu nu}F^{mu nu} and (ii) a two-form kinetic term H_{mu nu lambda}H^{mu nu lambda}. We compute the c
Externí odkaz:
http://arxiv.org/abs/1308.4488
Publikováno v:
Phys.Rev.D88:023529,2013
We place observational constraints on slow-variation single-field inflationary models by carrying out the cosmological Monte Carlo simulation with the recent data of Planck combined with the WMAP large-angle polarization, baryon acoustic oscillations
Externí odkaz:
http://arxiv.org/abs/1305.3044
Publikováno v:
Phys. Rev. D 87, 083520 (2013)
We study an inflationary scenario with a two-form field to which an inflaton couples non-trivially. First, we show that anisotropic inflation can be realized as an attractor solution and that the two-form hair remains during inflation. A statistical
Externí odkaz:
http://arxiv.org/abs/1303.7340
Autor:
Ohashi, Junko, Tsujikawa, Shinji
Publikováno v:
JCAP 1210 (2012) 035
For the models of inflation driven by the potential energy of an inflaton field $\phi$, the covariant Galileon Lagrangian $(\partial\phi)^2\Box \phi$ generally works to slow down the evolution of the field. On the other hand, if the Galileon self-int
Externí odkaz:
http://arxiv.org/abs/1207.4879
Autor:
Ohashi, Junko, Tsujikawa, Shinji
Publikováno v:
Phys.Rev.D83:103522,2011
We study observational constraints on the assisted k-inflation models in which multiple scalar fields join an attractor characterized by an effective single field $\phi$. This effective single-field system is described by the Lagrangian $P=Xg(Y)$, wh
Externí odkaz:
http://arxiv.org/abs/1104.1565
Autor:
Ohashi, Junko, Tsujikawa, Shinji
Publikováno v:
Phys.Rev.D80:103513,2009
Cosmological scaling solutions, which give rise to a scalar-field density proportional to a background fluid density during radiation and matter eras, are attractive to alleviate the energy scale problem of dark energy. In the presence of multiple sc
Externí odkaz:
http://arxiv.org/abs/0909.3924
Autor:
Ohashi, Junko, Kawai, Takako
Publikováno v:
British Journal of Community Nursing; Jun2023, Vol. 28 Issue 6, p276-282, 7p
