Meeting PRIN "String Theory as a bridge between Gauge Theories and Quantum Gravity"

Contribution List

1. Constructing solutions to crossing relations

Agnese Bissi

22/06/2023, 14:30

In this talk I will discuss how to write down generalized group-theoretic crossing equations for a unitary Euclidean CFT and how to construct an exact solution to it. I will also present its connection to the cosmological bootstrap program.

2. On the stability and deformability of topological stars

Giuseppe Sudano

22/06/2023, 16:00

Topological stars, or top star for brevity, are smooth horizonless static solutions of Einstein-Maxwell theory in 5-d, that reduce to spherically symmetric solutions of Einstein-Maxwell-Dilaton theory in 4-d. In the framework of the fuzzball program, they represent possible microstate geometries for non-supersymmetric black holes. The study of linear scalar perturbations of top stars allows to...

3. A Rutherford-like formula for scattering off Kerr-Newman BHs and subleading corrections

Claudio Gambino (Istituto Nazionale di Fisica Nucleare)

22/06/2023, 16:45

Analytic methods for studying gravitational processes have received review interest due to their application to gravitational wave phenomenology. In this direction, one of the challenges is to develop a systematic apparatus to obtain the dynamics of spinning objects from the classical limit of quantum scattering amplitudes.
Exploring the Kerr-Schild gauge properties seems promising, and...

4. Meeting organizzativo PRIN

Massimo Bianchi (Università di Roma Tor Vergata)

22/06/2023, 17:45

5. The case for dS_2

Dyonisos Anninos

23/06/2023, 09:30

We discuss the Euclidean picture of semi classical gravity with positive cosmological constant, and the Gibbons-Hawking relation for the cosmological horizon entropy. We argue that many features remain non-trivial in two-dimensional toy models and discuss a variety of computational tools that can lead to exact expressions.

6. Analytic bootstrap for magnetic impurities

Lorenzo Bianchi (Istituto Nazionale di Fisica Nucleare)

23/06/2023, 11:00

We will discuss two classes of line defects in the O(N) critical model at the Wilson-Fisher fixed point. These extended excitations are relevant for condensed matter systems, such as doped quantum antiferromagnets. After reviewing some state-of-the-art analytic bootstrap techniques, we will apply them to compute the correlator of two bulk excitations at first order in the epsilon expansion....