119 citations · 155 across the 5 of their papers we have counts for
6 papers
Dimensional (In)dependence of Lorentzian Quantum Cosmology
Masazumi Honda, Hiroki Matsui, Kota Numajiri +2
We study transition amplitudes of the quantum universe in -dimensional spacetime within the de Sitter minisuperspace approximation in Einstein gravity. Using the Lorentzian path…
Casimir-Induced Quintessence in Dark Dimension
Tomoki Katayama, Hiroki Matsui, Yuri Michinobu +3
We investigate a concrete realization of the Dark Dimension scenario, where a single large extra dimension is set at sub-millimeter scales. In this framework, the Casimir energy of…
-term Multi-Field Inflation in Supergravity without Stabiliser Superfields
Jinn-Ouk Gong, Sergei V. Ketov, Takahiro Terada
Realising -term slow-roll inflation in supergravity is non-trivial due to the well-known -problem. The common strategy to solve the problem is to impose a shift symmetry on t…
Induced Gravitational Waves probing Primordial Black Hole Dark Matter with Memory Burden
Kazunori Kohri, Takahiro Terada, Tsutomu T. Yanagida
Quantum evaporation of a black hole is conventionally studied semiclassically by assuming self-similarity of the black hole throughout the evaporation process. However, its validit…
Quintessential interpretation of the evolving dark energy in light of DESI
Yuichiro Tada, Takahiro Terada
The recent result of Dark Energy Spectroscopic Instrument (DESI) in combination with other cosmological data shows evidence of the evolving dark energy parameterized by CDM…
Resurgence in Lorentzian quantum cosmology: No-boundary saddles and resummation of quantum gravity corrections around tunneling saddle points
Masazumi Honda, Hiroki Matsui, Kazumasa Okabayashi +1
We revisit the path-integral approach to the wave function of the Universe by utilizing Lefschetz thimble analyses and resurgence theory. The traditional Euclidean path-integral of…