SFU Cosmology Seminars

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Tuesday, 8 November 2022, 11:00 in P8445A

Dr. Daniel Jiménez Aguilar (University of the Basque Country)

The dynamics of domain wall strings
In many field theories, solitonic solutions admit localized excitations with unnaturally long lifetimes in their spectrum of perturbations. These bound states may play a significant role in the dynamics of solitons, and in particular, they could shed light on some aspects concerning the evolution of cosmic string networks. In this talk I will discuss the influence of this type of excitations on the dynamics of string-like domain walls in 2+1 dimensions, focusing mostly on interesting resonance phenomena arising from the interaction of different modes at a non-linear level. The processes by which the excited string can emit radiation will also be analyzed, and the motion of the soliton in lattice field theory simulations will be contrasted with the one predicted by the Nambu-Goto action.

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