The program is (Time zone is CET):
13:30 - 14.10: Andrea Fontanella (ITMP, Moscow State University)
14.10 - 14.50: Marieke van Beest (University of Oxford)
14.50 - 15.00: short break
15.00 - 15.40: Andrea Puhm (Ecole Polytechnique)
15.40 - 16.00: break
16.00 - 17.00 discussion moderated by Konstantin Zarembo (Nordita)
TITLES + ABSTRACTS
Speaker: Andrea Fontanella
Title: Classical solutions and semiclasscial expansion of non-relativistic strings in AdS5xS5
14.50 - 15.00: short break
15.00 - 15.40: Andrea Puhm (Ecole Polytechnique)
15.40 - 16.00: break
16.00 - 17.00 discussion moderated by Konstantin Zarembo (Nordita)
TITLES + ABSTRACTS
Speaker: Andrea Fontanella
Title: Classical solutions and semiclasscial expansion of non-relativistic strings in AdS5xS5
Abstract: The S-matrix of a theory is certainly an interesting object to compute, since it encodes many physical properties of it. In this talk we present some recent work which aim to pave the ground towards an S-matrix computation for non-relativistic strings in AdS5xS5.
After introducing some key features of the theory, we shall first address the question of how classical string solutions look like. We shall point out that every solution has a common feature, due to solving the equations of motion for the Lagrange multiplier fields. Some string solutions with closed and twisted boundary conditions will be presented, and they represent the non-relativistic (and twisted) analogue of the BMN and GKP solutions for the relativistic theory. The second part of the talk focusses on the semiclassical expansion of the theory in large coupling regime around the twisted BMN-like solution. To perform this expansion we shall fix light-cone gauge and also expand in large radius. We shall comment on differences with the semiclassical expansion of the relativistic theory, and point out future steps towards an S-matrix computation.
Speaker: Marieke van Beest
Title: Holography, 1-form symmetries, and confinement
Abstract: I will discuss confinement in 4d N=1 SU(N) Super-Yang Mills from a holographic point of view, focusing on the 1-form symmetry and its mixed 0-/1-form symmetry anomaly, which is closely related to chiral symmetry breaking. Moreover, from the dual gravity description we identify the IR 4d topological field theory, which realises chiral symmetry breaking and matches the mixed anomaly. The talk is based on [2104.12764].
Speaker: Andrea Puhm
Title: Towards flat space holography via diamonds on the celestial sphere
Abstract: The basic observable of quantum gravity in asymptotically flat spacetimes is the S-matrix. When recast in a basis of boost eigenstates scattering amplitudes transform as conformal correlators of primary operators in the dual ''celestial CFT''. This observation together with novel insights about the infrared aspects of gauge theory and gravity have reinvigorated attempts at a holographic principle for flat space. Essential to building a holographic dictionary is to understand the spectrum and the symmetries of the dual theory. I will describe recent progress in this direction.
