64 citations · 105 across the 6 of their papers we have counts for
6 papers
Forecast constraints on the axion-photon coupling from interstellar medium heating
Makoto Amakawa, Tomohiro Fujita, Shinji Tsujikawa
In interstellar media characterized by a nonrelativistic plasma of electrons and heavy ions, we study the effect of axion dark matter coupled to photons on the dynamics of an elect…
Low-Scale Inflationary Magnetogenesis without Baryon Isocurvature Problem
Kazuki Yanagihara, Fumio Uchida, Tomohiro Fujita +1
Primordial magnetogenesis is an intriguing possibility to explain the origin of intergalactic magnetic fields (IGMFs). However, the baryon isocurvature problem has recently been po…
Particle production in the oscillating inflation model
S. Tsujikawa
We investigate the particle production of a scalar field coupled to an inflaton field () in the {\it oscillating inflation} model, which was recently proposed…
A new twist to preheating
S. Tsujikawa, B. A. Bassett
Metric perturbations typically strengthen field resonances during preheating. In contrast we present a model in which the super-Hubble field resonances are completely {\em suppress…
Spinodal effect in the natural inflation model
S. Tsujikawa, T. Torii
Recently, Cormier and Holman pointed out that fluctuations of an inflaton field are significantly enhanced in the model of {\it spinodal inflation} with a potential for…
Preheating with non-minimally coupled scalar fields in higher-curvature inflation models
S. Tsujikawa, K. Maeda, T. Torii
In higher-curvature inflation models (), we study a parametric preheating of a scalar field coupled non-minimally to a spacetime curvature (). In the cas…