Triangle Seminars
Thursday, 28 Apr 2016
Black Hole Collisions in Asymptotically anti-de Sitter Spacetimes
Hans Bantilan
(QMUL)
Abstract:
The collision of black holes is a classic problem in the strong-field regime of general relativity, with no known closed-form solution. When exact solutions are not known, or perturbative expansions about known solutions are inadequate to capture the non-linear dynamics, the numerical solution of the Einstein field equations is required. The main purpose of this talk is to describe, in detail, the necessary ingredients for achieving stable Cauchy evolution of black hole collisions in asymptotically anti-de Sitter (AdS) spacetimes. I will begin by motivating this program in terms of the heavy-ion physics it is intended to clarify. I will then give an overview of anti-de Sitter space, the mapping to its dual boundary conformal field theory, and the method we use to numerically solve the fully non-linear Einstein field equations with AdS boundary conditions. As a concrete example of these ideas, I will describe simulations of stable AdS black hole mergers in 5 dimensions.
The collision of black holes is a classic problem in the strong-field regime of general relativity, with no known closed-form solution. When exact solutions are not known, or perturbative expansions about known solutions are inadequate to capture the non-linear dynamics, the numerical solution of the Einstein field equations is required. The main purpose of this talk is to describe, in detail, the necessary ingredients for achieving stable Cauchy evolution of black hole collisions in asymptotically anti-de Sitter (AdS) spacetimes. I will begin by motivating this program in terms of the heavy-ion physics it is intended to clarify. I will then give an overview of anti-de Sitter space, the mapping to its dual boundary conformal field theory, and the method we use to numerically solve the fully non-linear Einstein field equations with AdS boundary conditions. As a concrete example of these ideas, I will describe simulations of stable AdS black hole mergers in 5 dimensions.
Posted by: QMW
Towards a theory of gravitational radiation
📍 London
Pawel Nurowski
(Centre for Theoretical Physics, Polish Academy of Sciences, Warsaw, Poland)
Abstract:
The recent observation of gravitational waves by LIGO has revived interest in the work on the theory of gravitational radiation done at King's and elsewhere in the 1950's and early 60's. It is well known that after predicting gravitational waves in 1916 Einstein became uncertain about their physical reality. It wasn't until the 1950's and early 60's that their physical status was clarified. Important contributions to the development of the theory of gravitational radiation were made at this time by members of the King's relativity group such as Hermann Bondi, Felix Pirani and Roger Penrose. In 1958 Andrzej Trautman from Leopold Infeld's relativity group in Warsaw delivered a series of highly influential lectures on gravitational radiation at King's. In this talk the work of the Warsaw group, and Trautman in particular, will be discussed and its influence on the development of gravitational wave
theory will be explained.
Refreshments will be available after the lecture. Please RSVP to:
D C Robinson
david.c.robinson@kcl.ac.uk
The recent observation of gravitational waves by LIGO has revived interest in the work on the theory of gravitational radiation done at King's and elsewhere in the 1950's and early 60's. It is well known that after predicting gravitational waves in 1916 Einstein became uncertain about their physical reality. It wasn't until the 1950's and early 60's that their physical status was clarified. Important contributions to the development of the theory of gravitational radiation were made at this time by members of the King's relativity group such as Hermann Bondi, Felix Pirani and Roger Penrose. In 1958 Andrzej Trautman from Leopold Infeld's relativity group in Warsaw delivered a series of highly influential lectures on gravitational radiation at King's. In this talk the work of the Warsaw group, and Trautman in particular, will be discussed and its influence on the development of gravitational wave
theory will be explained.
Refreshments will be available after the lecture. Please RSVP to:
D C Robinson
david.c.robinson@kcl.ac.uk
Posted by: KCL