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The Future of Numerical Relativity: Gravitational Memory, BMS Frames, and More
As was realized by Bondi, Metzner, van der Burg, and Sachs (BMS), the symmetry group of asymptotic infinity is not the Poincaré group, but an infinite-dimensional group called the BMS...
Nov 17, 2022
On the fate of the LR instability
Abstract and Zoom Link: https://pitp.zoom.us/j/91762985902?pwd=djhwYVdsQ25GVVBRVTlwSkQvaDJ4Zz09
Oct 18, 2022
Quantum Gravity Demystified
One fruitful strategy of tackling quantum gravity is to adapt quantum field theory to the situation where spacetime geometry is dynamical, and to implement diffeomorphism symmetry in a way that...
Oct 27, 2022
: From black holes to the Big Bang: astrophysics and cosmology with gravitational waves and their electromagnetic counterparts
The growing catalog of gravitational-wave signals from compact object mergers has allowed us to study the properties of black holes and neutron stars more precisely than ever before and has...
Oct 27, 2022
Evaporating Black-to-White Hole
What is the ultimate fate of black holes? Since the discovery of Hawking evaporation process, the issue has been much discussed. Loop quantum gravity suggests that black hole could ultimately...
Oct 10, 2019
Perspectives on Matter Effects in GW170817
The detection of coalescing neutron stars via gravitational waves (GW170817) has revolutionized our understanding of the equation of state at supranuclear densities. The equation of state determines how neutron stars...
Oct 17, 2019
No entailing laws, but enablement in the evolution of the biosphere
Biological evolution is a complex blend of ever changing structural stability, variability and emergence of new phenotypes, niches, ecosystems. We wish to argue that the evolution of life marks the...
Oct 17, 2019
Gabriela González, Louisiana State University
Albert Einstein predicted a century ago the existence of gravitational waves – ripples in the fabric of spacetime moving at the speed of light. It was believed that these ripples...
Oct 23, 2019
Central extension in gravity
The asymptotic symmetry charge algebra of certain class of spacetimes could have a nontrivial central extension, which measures the non-equivariance of the charges of the large gauge transformations. The Cardy...
Oct 24, 2019
Real-time dynamics of plasma balls in a confining background
Black holes in the background of the AdS soliton are, according to the gauge/gravity correspondence, dual to droplets of deconfined plasma surrounded by a confining vacuum. In this talk I...
Oct 31, 2019