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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:C19037 - Cosmological Frontiers in Fundamental Physics 2019PODCAST Subscribe to podcast

Cosmological Frontiers in Fundamental Physics 2019

Organizer(s): Niayesh Afshordi   Latham Boyle   Lena Funcke   Elias Kiritsis   Laura Lopez Honorez  

Collection URL: http://pirsa.org/C19037


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PIRSA:19090016  ( MP4 Medium Res , MP3 , PDF ) Which Format?
CPT-Symmetric Universe
Speaker(s): Latham Boyle
Abstract: I will introduce our recent proposal that the state of the universe does *not* spontaneously violate CPT. Instead, the universe after the big bang is the CPT image of the universe before it, both classically and quantum mechanically. The pre- and post-bang epochs comprise a universe/anti-universe... read more
Date: 03/09/2019 - 9:30 am

PIRSA:19090023  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Brane cosmology and the self-tuning of the cosmological constant
Speaker(s): Francesco Nitti
Abstract:
Date: 03/09/2019 - 10:45 am

PIRSA:19090022  ( MP4 Medium Res , MP3 , PDF ) Which Format?
New Physics in the Rayleigh-Jeans tale of the CMB and cosmic 21cm signal
Speaker(s): Maxim Pospelov
Abstract:
Date: 03/09/2019 - 11:30 am

PIRSA:19090019  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Gravitational waves in the inhomogeneous Universe
Speaker(s): Masamune Oguri
Abstract: The discovery of gravitational waves from a binary black hole merger in 2015 opened up a new window to study the Universe, including the origin of black holes, the nature of dark matter, and the expansion history of the Universe. However, gravitational waves emitted from binary mergers propagate th... read more
Date: 03/09/2019 - 2:00 pm

PIRSA:19090020  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Weak Gravity Conjecture From Amplitudes’ Positivity
Speaker(s): Brando Bellazzini
Abstract: I will show how to derive new positivity bounds for scattering amplitudes in theories with a massless graviton in the spectrum in four spacetime dimensions. The bounds imply that extremal black holes are self-repulsive, M/|Q|<1 once higher dimensional operators are taken into account, and that they are unstable to decay to smaller extremal black holes, hence providing an S-matrix proof of the weak gravity conjecture.
Date: 03/09/2019 - 2:45 pm

PIRSA:19090057  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Discussion: Where in the Cosmos should we look for novel physics?
Speaker(s): Elias Kiritsis
Abstract:
Date: 03/09/2019 - 4:00 pm

PIRSA:19090012  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Gravitational wave standard sirens
Speaker(s): Samaya Nissanke
Abstract:
Date: 04/09/2019 - 9:30 am

PIRSA:19090013  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Cosmology and fundamental physics with FRBs
Speaker(s): Ue-Li Pen
Abstract: FRBs are the only known sources of extragalactic coherent radiation, that show interference phenomena after traveling over cosmological distances. The interferometric probe allows equivalent strain measurements of $hsim 10^{-26}$, opening new windows for gravitational wave detection, dark matter pr... read more
Date: 04/09/2019 - 10:45 am

PIRSA:19090014  ( MP4 Medium Res , MP3 , PDF ) Which Format?
CHIME: The Canadian Hydrogen Intensity Mapping Experiment
Speaker(s): Kendrick Smith
Abstract: CHIME is a new interferometric telescope at radio frequencies 400-800 MHz. The mapping speed (or total statistical power) of CHIME is among the largest of any radio telescope in the world, and the technology powering CHIME could be used to build telescopes which are orders of magnitude more powerful... read more
Date: 04/09/2019 - 11:30 am

PIRSA:19090025  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The Planck Legacy: Inflation and the Origin of Structure in the Universe
Speaker(s): George Efstathiou
Abstract:
Date: 04/09/2019 - 3:30 pm

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