SFU Cosmology Seminars

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Tuesday, 11 April 2023, 17:00 in Zoom

Prof. Shinji Mukohyama (Kyoto)

Effective field theory of black hole perturbations with timelike scalar profile
Many dark energy (DE) models are based on a scalar field with timelike gradient. In this talk we begin with a review of the systematic construction of the effective field theory (EFT) describing perturbations around the Minkowski background with a timelike scalar profile and its extension to cosmological backgrounds, i.e. the ghost condensation and the EFT of inflation/DE. If one hopes to learn something about the EFT of DE from black holes (BHs) then one needs to consider BH solutions with timelike scalar profiles. We thus extend the EFT to arbitrary backgrounds. Finally, as an application of the general EFT, we study odd-parity perturbations around a spherically symmetric, static black hole background with a timelike scalar field responsible for DE and compute quasi-normal mode frequencies.

References: arXiv:2204.00228; arXiv:2208.02943

Zoom: Zoom

Seminars in 2022:

2022-10-04 11:00 in Zoom - Chad Briddon (Nottingham): Using SELCIE to investigate screened scalar field models sourced by complex systems

2022-10-05 14:30 in P8445B - Chi-kwan Chan (Steward Observatory, U. of Arizona): Resolving the galactic center black hole with the Event Horizon Telescope

2022-10-25 14:00 in P8445A - Victor Pozsgay (Imperial College, London): Low-energy EFT causality bounds

2022-11-08 11:00 in P8445A - Daniel Jiménez Aguilar (University of the Basque Country): The dynamics of domain wall strings

2023-01-24 14:00 in P8445A - Bartolomeo Fiorini (Queen Mary): Studying large-scale structure probes of modified gravity with COLA

2023-01-25 13:00 in P8445A - Rajendra Gupta (Ottawa): Do fundamental constants vary on cosmological time scale?

2023-04-11 17:00 in Zoom - Shinji Mukohyama (Kyoto): Effective field theory of black hole perturbations with timelike scalar profile

2023-05-09 11:30 in Zoom - José Tomás Gálvez Ghersi (Universidad de Ingeniería y Tecnología, Peru): Dimensional deformation of sine-Gordon breathers into oscillons

[ See complete seminar archives | iCal feed ]

Modified by Andrei Frolov <frolov@sfu.ca> on 2023-11-01

2022-10-04 11:00 in Zoom	- Chad Briddon (Nottingham): Using SELCIE to investigate screened scalar field models sourced by complex systems
2022-10-05 14:30 in P8445B	- Chi-kwan Chan (Steward Observatory, U. of Arizona): Resolving the galactic center black hole with the Event Horizon Telescope
2022-10-25 14:00 in P8445A	- Victor Pozsgay (Imperial College, London): Low-energy EFT causality bounds
2022-11-08 11:00 in P8445A	- Daniel Jiménez Aguilar (University of the Basque Country): The dynamics of domain wall strings
2023-01-24 14:00 in P8445A	- Bartolomeo Fiorini (Queen Mary): Studying large-scale structure probes of modified gravity with COLA
2023-01-25 13:00 in P8445A	- Rajendra Gupta (Ottawa): Do fundamental constants vary on cosmological time scale?
2023-04-11 17:00 in Zoom	- Shinji Mukohyama (Kyoto): Effective field theory of black hole perturbations with timelike scalar profile
2023-05-09 11:30 in Zoom	- José Tomás Gálvez Ghersi (Universidad de Ingeniería y Tecnología, Peru): Dimensional deformation of sine-Gordon breathers into oscillons