23 citations · 83 across the 9 of their papers we have counts for
5 papers · 1 filter
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…
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…
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- f…
Parity-violating scalar trispectrum from a rolling axion during inflation
Tomohiro Fujita, Tomoaki Murata, Ippei Obata +1
We study a mechanism of generating the trispectrum (4-point correlation) of curvature perturbation through the dynamics of a spectator axion field and U(1) gauge field during infla…