High Energy Physics Seminars next week - Lagares and Salazar

[HECAP - Margherita Di Giovannantonio]

*_HIGH ENERGY PHYSICS SEMINARS_*
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*Tuesday, 06 Odtober *2026, at *16:00* - *L. Stasi* Seminar Room 
-*https://indico.ictp.it/event/11515/*

/!!! in person only !!/

Martin Lagares (Queen Mary University of London)


*“Towards Integrability Beyond Flat Space"*
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_*Abstract*_

Over the past decades, integrability techniques have emerged as powerful 
tools for exploring a wide class of quantum field theories beyond their 
weak-coupling regime. These methods, which rely on the existence of an 
infinite set of mutually commuting conserved charges, have led to 
notable milestones such as the all-loop derivation of certain 
two-dimensional scattering matrices and remarkable finite-coupling 
results for the spectra of theories such as N=4 super Yang-Mills. 
However, although these techniques have been widely studied in flat 
space, little is known about their extension to the analysis of quantum 
field theories in curved spacetimes. With this goal in mind, in this 
talk I will discuss the integrability properties of the O(N) non-linear 
sigma model when placed on a curved background.  In particular, I will 
demonstrate the existence of an infinite set of non-local currents whose 
conservation persists upon quantization, and I will comment on how this 
result opens the door to an integrable bootstrap approach of boundary 
correlators in AdS2.
/Based on work in progress with Tarek Anous and Charles Thomas./


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*Thursday, 08 October *2026, at *16:00* - *L. Stasi* Seminar Room 
-*https://indico.ictp.it/event/11516/*

Ignacio Salazar (Instituto de Física La Plata)


*“Renormalization Group Irreversibility of Quantum Field Theory in AdS**"*
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_*Abstract*_

We will study nonperturbative aspects of quantum field theory (QFT) in 
rigid anti de Sitter (AdS) spacetime using quantum information theoretic 
methods. While irreversibility of renormalization group (RG) flows is 
well established in flat space, it is not obvious whether it persists in 
AdS, where negative curvature and an asymptotic timelike boundary 
significantly modify infrared dynamics. Using strong subadditivity and 
AdS invariance, we will derive an entropic second-order differential 
inequality for the difference between the vacuum entanglement entropy of 
a QFT and that of its ultraviolet fixed point, evaluated for spherical 
bulk regions. This inequality will allow us to define RG charges that 
measure the relevant number of degrees of freedom, and we prove the 
irreversibility of the RG in and spacetime dimensions. Then we will 
present some examples where these inequalities can be tested.

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*To attend via Zoom kindly register here:*
https://zoom.us/meeting/register/Rp2nkJcQSSeSBAJBsKsJdA