2 citations · 2 across the 2 of their papers we have counts for
5 papers
STOchastic LAttice Simulation of hybrid inflation
Tomoaki Murata, Yuichiro Tada
We investigate the spatial profile of the curvature perturbation generated in multi-waterfall hybrid inflation models, which are known to produce various topological defects. Using…
Stochastic-tail of the curvature perturbation in hybrid inflation
Tomoaki Murata, Yuichiro Tada
The exponential-tail behaviours of the probability density function (PDF) of the primordial curvature perturbation are confirmed in the mild-waterfall variants of hybrid inflation…
Ghost-free 2-form fields in cosmology: implications for gravitational parity violation
Yuki Horii, Tomoaki Murata, Tsutomu Kobayashi
We explore the possibility of parity-violating, nonminimally coupled 2-form field theories that retain the same dynamical degrees of freedom as a massive 2-form and thus are ghost-…
STOLAS: STOchastic LAttice Simulation of cosmic inflation
Yurino Mizuguchi, Tomoaki Murata, Yuichiro Tada
We develop a C++ package of the STOchastic LAttice Simulation (STOLAS) of cosmic inflation. It performs the numerical lattice simulation in the application of the stochastic-…
Chromo-natural inflation supported by enhanced friction from Horndeski gravity
Tomoaki Murata, Tsutomu Kobayashi
We study the extension of the chromo-natural inflation model by incorporating nonminimal coupling between the axion field and gravity. Nonminimal coupling is introduced so that it…