Format results
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Dark matter phenomenology across cosmic times
Yacine Ali-Haimoud - Johns Hopkins University
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A Dark Matter of Superfluid
Justin Khoury - University of Pennsylvania
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Inhomogeneous Anisotropic Cosmology
Leonardo Senatore - ETH Zurich
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A new probe of primordial magnetic fields at high redshift
Vera Gluscevic - University of Southern California
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Turbulent gravity in asymptotically AdS spacetimes
Stephen Green - University of Nottingham
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Black hole ringdown and quasinormal modes
Aaron Zimmerman - The University of Texas at Austin
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The Dynamical Strong-field Regime of General Relativity
Frans Pretorius - Princeton University
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What does the Advanced LIGO detection say about gravity?
Nicolas Yunes - University of Illinois Urbana-Champaign
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Spacetime Dynamics of the Higgs Instability and the Fate of the Early Universe
William East - Perimeter Institute for Theoretical Physics
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Dark matter phenomenology across cosmic times
Yacine Ali-Haimoud - Johns Hopkins University
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… -
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The Classicality Puzzle
Jean-Luc Lehners - Self Employed
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… -
Inhomogeneous Anisotropic Cosmology
Leonardo Senatore - ETH Zurich
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 for… -
A new probe of primordial magnetic fields at high redshift
Vera Gluscevic - University of Southern California
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… -
Turbulent gravity in asymptotically AdS spacetimes
Stephen Green - University of Nottingham
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… -
Black hole ringdown and quasinormal modes
Aaron Zimmerman - The University of Texas at Austin
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… -
The Dynamical Strong-field Regime of General Relativity
Frans Pretorius - Princeton University
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… -
What does the Advanced LIGO detection say about gravity?
Nicolas Yunes - University of Illinois Urbana-Champaign
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… -
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Spacetime Dynamics of the Higgs Instability and the Fate of the Early Universe
William East - Perimeter Institute for Theoretical Physics
A remarkable feature of the Standard Model is that it predicts that, in the absence of new physics, the Higgs field should become unstable at large energies. Though the electroweak vacuum should currently be metastable on timescales that are long compared to the age of the Universe, during an…