4 citations · 4 across the 5 of their papers we have counts for
5 papers
Gravitational Waves from Superconducting Cosmic Strings
Jinyoung Jhun, Takashi Hiramatsu
We study the evolution of superconducting cosmic-string networks in a field-theoretic model using three-dimensional lattice field simulat…
CMB spectrum in unified EFT of dark energy: scalar-tensor and vector-tensor theories
Katsuki Aoki, Mohammad Ali Gorji, Takashi Hiramatsu +3
We study the cosmic microwave background (CMB) radiation in the unified description of the effective field theory (EFT) of dark energy that accommodates both scalar-tensor and vect…
Dynamical simulations of colliding superconducting strings
Takashi Hiramatsu, Marc Lilley, Daisuke Yamauchi
We study the collisions of elastic superconducting strings, also referred to as current-carrying strings, formed in a field-theory model…
Axionic defects in the CMB: birefringence and gravitational waves
Ricardo Z. Ferreira, Silvia Gasparotto, Takashi Hiramatsu +2
The evidence for a non-vanishing isotropic cosmic birefringence in recent analyses of the CMB data provides a tantalizing hint for new physics. Domain wall (DW) networks have recen…
String-wall composites winding around a torus knot vacuum in an axionlike model
Minoru Eto, Takashi Hiramatsu, Izumi Saito +1
We study a simple axionlike model with a charged scalar and a double-charged scalar of global symmetry. A particular feature of our model is that a vacuum manifold i…