87 citations · 561 across the 20 of their papers we have counts for
7 papers · 1 filter
Superluminal propagation from IR physics
Asuka Ito, Teruaki Suyama
One may believe that front velocities of waves in a given theory coincide with the UV limit of phase velocities for any dispersion relations. This implies that IR physics is irrele…
Gravitational Waves in Metastable Supersymmetry Breaking
Chong-Sun Chu, Asuka Ito
If supersymmetry is broken in metastable vacua, it is not clear why we are now in there rather than supersymmetric vacua. Moreover, it is natural to expect that we were in supersym…
Cosmic No-hair Conjecture and Inflation with an SU(3) Gauge Field
Pengyuan Gao, Kazufumi Takahashi, Asuka Ito +1
We study inflationary universes with an SU(3) gauge field coupled to an inflaton through a gauge kinetic function. Although the SU(3) gauge field grows at the initial stage of infl…
Anisotropic Constant-roll Inflation
Asuka Ito, Jiro Soda
We study constant-roll inflation in the presence of a gauge field coupled to an inflaton. By imposing the constant anisotropy condition, we find new exact anisotropic constant-roll…
Primordial Gravitational Waves Induced by Magnetic Fields in an Ekpyrotic Scenario
Asuka Ito, Jiro Soda
Both inflationary and ekpyrotic scenarios can account for the origin of the large scale structure of the universe. It is often said that detecting primordial gravitational waves is…
MHz Gravitational Waves from Short-term Anisotropic Inflation
Asuka Ito, Jiro Soda
We reveal the universality of short-term anisotropic inflation. As a demonstration, we study inflation with an exponential type gauge kinetic function which is ubiquitous in models…
Designing Anisotropic Inflation with Form Fields
Asuka Ito, Jiro Soda
We study inflation with anisotropic hair induced by form fields. In four dimensions, the relevant form fields are gauge (one-form) fields and two-form fields. Assuming the exponent…