From the 1 of 4 linked papers with an AI index.
4 papers
Gravitational Waves from Superconducting Cosmic Strings
Jinyoung Jhun, Takashi Hiramatsu
The authors simulate superconducting cosmic‑string networks in a U(1)ₗₒcₐₗ × U(1)𝓰ₗₒbₐₗ field‑theoretic model, study how the coupling between the string‑forming and current‑carryi…
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…
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…
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…