PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE
Subscribe to podcastCosmological Frontiers in Fundamental Physics 2016
Organizer(s):
Collection URL: http://pirsa.org/C16009
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 | Welcome and Opening Remarks Speaker(s):
Abstract:
Date: 14/06/2016 - 9:30 am
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 | Dark matter phenomenology across cosmic times Speaker(s): Yacine Ali-Haimoud
Abstract: The nature of dark matter remains one of the most nagging problems in cosmology. In this talk I will discuss several existing or potential probes of dark matter. I will start with a well known hot dark matter, massive neutrinos, and discuss their effect on large-scale structure in the non-linear reg... read more
Date: 14/06/2016 - 9:40 am
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 | The Classicality Puzzle Speaker(s): Jean-Luc Lehners
Abstract: Why was the early universe classical? Along with the big bang singularity problem and the flatness, horizon and inhomogeneity puzzles, this is one of the big unexplained features of the hot big bang scenario. In this talk I will discuss how inflation and ekpyrosis, which have mainly been considered ... read more
Date: 14/06/2016 - 3:20 pm
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 | Inhomogeneous Anisotropic Cosmology Speaker(s): Leonardo Senatore
Abstract: In homogeneous and isotropic Friedmann-Robertson-Walker cosmology, the topology of the universe determines its ultimate fate. If the Weak Energy Condition is satisfied, open and flat universes must expand forever, while closed cosmologies can recollapse to a Big Crunch. A similar statement holds ... read more
Date: 14/06/2016 - 4:25 pm
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 | A new probe of primordial magnetic fields at high redshift Speaker(s): Vera Gluscevic
Abstract: I will present a novel method for probing extremely weak large-scale magnetic fields in the intergalactic medium prior to the epoch of reionization. This method relies on the effect of spin alignment of hydrogen atoms in a cosmological setting, and on the effect of magnetic precession of the atoms o... read more
Date: 14/06/2016 - 5:15 pm
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 | Turbulent gravity in asymptotically AdS spacetimes Speaker(s): Stephen Green
Abstract: Dynamics in asymptotically anti-de Sitter spacetimes with reflecting boundary conditions are characterized by reduced dissipation as compared to asymptotically flat spacetimes. Such spacetimes, thus, represent opportunities to study nonlinear gravitational interactions that would otherwise be quickl... read more
Date: 15/06/2016 - 9:30 am
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 | Black hole ringdown and quasinormal modes Speaker(s): Aaron Zimmerman
Abstract: The first detection of gravitational waves came with an unexpected windfall: a clear signal from the merger of two black holes into a final, spinning black hole. General Relativity predicts that following merger, the final black hole relaxes by emitting radiation in a characteristic spectrum of deca... read more
Date: 15/06/2016 - 10:50 am
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 | The Dynamical Strong-field Regime of General Relativity Speaker(s): Frans Pretorius
Abstract: In this talk I will discuss some of the consequences for our understanding of strong-field gravity that can be gleaned from the recent detection of gravitational waves by the LIGO/Virgo collaboration.
The event heard, GW150914, is consistent with the emission of gravitational waves from the late in... read more
Date: 15/06/2016 - 11:40 am
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 | What does the Advanced LIGO detection say about gravity? Speaker(s): Nicolas Yunes
Abstract: The gravitational-wave observation GW150914 by Advanced LIGO provides the first opportunity to learn about theoretical physics mechanisms that may be present in the extreme gravity environment of coalescing binary black holes. The LIGO collaboration verified that this observation is consistent with ... read more
Date: 15/06/2016 - 3:00 pm
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