31 citations · 52 across the 6 of their papers we have counts for
6 papers
Macroscopic backreaction of the trace anomaly on classical vacuum backgrounds
Raúl Carballo-Rubio, Francesco Di Filippo, Shinji Mukohyama +1
We study the backreaction of quantum fields in the Boulware vacuum state on the Schwarzschild geometry, using the Riegert--Mottola--Vaulin renormalized stress-energy tensor derived…
Imprints of quantum vacuum fluctuations on the gravitational field of a spherical mass
Raúl Carballo-Rubio, Francesco Di Filippo, Shinji Mukohyama +1
The Schwarzschild geometry, describing the gravitational field of a spherical mass in classical vacuum, is one of the most famous vacuum solutions of the Einstein field equations.…
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…
Boulware Vacuum vs. Regularity: Thoughts on Anomaly-Induced Effective Action
Kota Numajiri, Kazumasa Okabayashi, Shinji Mukohyama
We examine the vacuum state and its corresponding renormalized stress-energy tensor (RSET) in static horizonless regular spacetime in both two and four dimensions. Using the local…
Greybody Factors Imprinted on Black Hole Ringdowns. II. Merging Binary Black Holes
Kazumasa Okabayashi, Naritaka Oshita
The spectral amplitude of the merger-ringdown gravitational wave (GW) emitted by a comparable mass-ratio black hole merger is modeled by the greybody factor of the remnant black ho…
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…