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gr-qc2025
Chiral gravitational waves from domain walls in Nieh-Yan gravity
Jiro Soda, Maki Takeuchi
We study the scattering of gravitational waves by axion domain walls in teleparallel gravity with the Nieh-Yan term. Since a domain wall causes the parity violation, the transmitte…
gr-qc2025
DBI scalar field cosmology in -DBI gravity
Nahomi Kan, Kiyoshi Shiraishi, Maki Takeuchi +1
We study inflationary characterictics of the universe in -DBI gravity, driven by DBI-deformed scalar fields. In this paper, we consider the evolution of the classical universe f…
gr-qc2024
Quantum BPS Cosmology
Nahomi Kan, Kiyoshi Shiraishi, Maki Takeuchi +1
There has been much discussion about the initial conditions of the early Universe in the context of quantum theory. In this paper, we construct the wave function and probability di…