3 papers
gr-qc2024
Jackiw-Teitelboim Gravity and Lorentzian Quantum Cosmology
Masazumi Honda, Hiroki Matsui, Kota Numajiri +1
We directly evaluate the probability amplitudes in Jackiw-Teitelboim (JT) gravity using the Lorentzian path integral formulation. By imposing boundary conditions on the scale facto…
astro-ph.CO2024
Exactly solvable stochastic spectator
Masazumi Honda, Ryusuke Jinno, Koki Tokeshi
The stochastic formalism of inflation allows us to describe the scalar-field dynamics in a non-perturbative way. The correspondence between the diffusion and Schrödinger equations…
gr-qc2024
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…