Gauge/Gravity Duality 2015

Session

Afternoon session

16 Apr 2015, 14:20

The Galileo Galilei Institute for Theoretical Physics (GGI)

30. Simulations of BH Collisions in AdS5

Paul Romatschke

16/04/2015, 14:20

In the context of gauge/gravity duality, it has been suggested that the far-from equilibrium strongly coupled dynamics encountered in ultrarelativistic heavy-ion collisions may be modeled as the collisions of black holes in asymptotic anti-de-Sitter spacetimes. I will present results from the evolution of spacetimes that describe the merger of asymptotically global AdS black holes in 5D with...

31. Equilibration rates in a strongly coupled nonconformal quark-gluon plasma

Alex Buchel

16/04/2015, 15:00

We study of equilibration rates of strongly coupled quark-gluon plasmas in the absence of conformal symmetry. We primarily consider a supersymmetric mass deformation within N}=2^* gauge theory and use holography to compute quasinormal modes of a variety of scalar operators, as well as the energy-momentum tensor. In each case, the lowest quasinormal frequency, which provides an approximate...

4. A more realistic thermalization scenario in holography

Koenraad Schalm

16/04/2015, 15:40

Holography has provided a brand new window on the thermalization of Yang-Mills plasmas. Compared to data from Relavistic Heavy Ion Collisions, holographic computations tend to (1) have a shorter thermalization time scale, (2) permit a linearized description in terms of quasinormal modes already at extremely early stages rather than close to the final configuration, (3) thermalize less from the...

32. Holographic Kondo defects and universality in holographic superconductors with broken translation symmetry

Johanna Erdmenger

16/04/2015, 16:40

For a recently established holographic model of a magnetic impurity coupled to a strongly interacting system, we consider quantum quenches as well as the entanglement entropy. Both provide information about the size and formation of the Kondo cloud which screens the impurity. As a second topic, I will present recent results on universal behaviour in a family of holographic s-wave...

34. Holographic spin fluctuation and competition of two orders

Sang-Jin Sin

16/04/2015, 17:10

33. A Monotonicity Theorem for Two-dimensional Boundaries and Defects

Andrew O'Bannon

16/04/2015, 17:40

I will propose a proof for a monotonicity theorem, or c-theorem, for a three-dimensional Conformal Field Theory (CFT) on a space with a boundary, and for a two-dimensional defect coupled to a higher-dimensional CFT. The proof is applicable only to renormalization group flows that are localized at the boundary or defect, such that the bulk theory remains conformal along the flow, and that...