Triangle Seminars
Tuesday, 5 Mar 2019
Rationalizing CFTs
Matthew Buican
(QMUL)
Abstract:
2D rational conformal field theories (RCFTs) are typically thought of as being the “nicest†interesting CFTs we can study: They have large enough symmetry so that there are only a finite number of primary fields, but they also have applications to the real world (e.g., to various condensed matter systems). In this talk, I will describe a program that aims to understand connections between exotic 4D theories with N=2 superconformal symmetry and more down-to-earth 2D RCFTs, thereby enriching our understanding of both.
2D rational conformal field theories (RCFTs) are typically thought of as being the “nicest†interesting CFTs we can study: They have large enough symmetry so that there are only a finite number of primary fields, but they also have applications to the real world (e.g., to various condensed matter systems). In this talk, I will describe a program that aims to understand connections between exotic 4D theories with N=2 superconformal symmetry and more down-to-earth 2D RCFTs, thereby enriching our understanding of both.
Posted by: IC
TBA
Weini Huang
(QMUL)
Wednesday, 6 Mar 2019
Schwinger-Keldysh effective field theories
Natalia Pinzani Fokeeva
(KU Leuven)
Abstract:
I will discuss novel effective field theories for hydrodynamics. After identifying the relevant low-energy degrees of freedom, I will show how the symmetries of the problem can be efficiently implemented using supersymmetry. Interestingly, a conserved entropy current naturally arises as a Noether current in superspace. If time permits, I will also show how to derive such effective actions from holography.
I will discuss novel effective field theories for hydrodynamics. After identifying the relevant low-energy degrees of freedom, I will show how the symmetries of the problem can be efficiently implemented using supersymmetry. Interestingly, a conserved entropy current naturally arises as a Noether current in superspace. If time permits, I will also show how to derive such effective actions from holography.
Posted by: IC
tba
Natalia Pinzani Fokeeva
(KU Leuven)
When black holes collide: Probing the quantum state of black holes by the spectrum of emitted gravitational waves
📍 London
Ramy Brustein
(Ben-Gurion University (Israel))
Abstract:
KCL TPPC Seminar
Abstract: Black hole (BH) mergers can be viewed as cosmological “scattering experiments†resulting in an excited BH, which then decays to its ground state by emitting gravitational waves (GW). I will present general arguments, based on fundamental physics principles, as to why we should expect additional quantum ringdown modes to those predicted by general relativity. Then, I will discuss the spectrum of the predicted ringdown modes, the resulting emitted GW and the prospects for their detection in LIGO/VIRGO.
KCL TPPC Seminar
Abstract: Black hole (BH) mergers can be viewed as cosmological “scattering experiments†resulting in an excited BH, which then decays to its ground state by emitting gravitational waves (GW). I will present general arguments, based on fundamental physics principles, as to why we should expect additional quantum ringdown modes to those predicted by general relativity. Then, I will discuss the spectrum of the predicted ringdown modes, the resulting emitted GW and the prospects for their detection in LIGO/VIRGO.
Posted by: KCLphysics
Soft Heisenberg Hair
Daniel Grumiller
(TU Wien)
Abstract:
Gravity theories naturally allow for edge states generated by non-trivial boundary-condition preserving diffeomorphisms. I present a specific set of boundary conditions inspired by near horizon physics, show that it leads to soft hair excitations of black hole solutions and discuss implications for black hole entropy.
Gravity theories naturally allow for edge states generated by non-trivial boundary-condition preserving diffeomorphisms. I present a specific set of boundary conditions inspired by near horizon physics, show that it leads to soft hair excitations of black hole solutions and discuss implications for black hole entropy.
Posted by: IC
Thursday, 7 Mar 2019
The Cosmological Constant and the Electroweak Scale
📍 London
Henry Tye
Abstract:
KCL TPPC Seminar
KCL TPPC Seminar
Posted by: KCLphysics