High Energy Physics Seminars next week - Post and Shukla

[HECAP - Margherita Di Giovannantonio]

*_HIGH ENERGY PHYSICS SEMINARS_*
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*!!!Please note different venues!!!*
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*Tuesday, 26 May *2026, at *16:00* - *_Euler Lecture 
Hall_***-*https://indico.ictp.it/event/11286/*


Boris Post (University of Oxford)


*“A Universal Sum Over Topologies in 3d Gravity"*
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_Abstract_

In this talk, I will explore how the sum over topologies in pure AdS_3​ 
quantum gravity furnishes a consistent statistical interpretation of the 
boundary CFT_2. By formulating a statistical version of the conformal 
bootstrap, which combines crossing symmetry with typicality at high 
energies, we will discover a large set of non-handlebody topologies in 
the bulk (of which I will give some examples) that are needed for 
consistency of the boundary description. Interestingly, this set 
contains only on-shell (i.e. hyperbolic) 3-manifolds, but not all of 
them. This suggests that the full sum over all on-shell saddles in 3d 
gravity may be a highly non-minimal solution of the statistical bootstrap.
/This talk is based on 2601.07906 with Belin, Collier, Eberhardt and Liska./


To attend via _*Zoom*_, please *_register_* here:
https://zoom.us/meeting/register/vmsQrjIvTVuWOYV7g7T5Qg


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*Thursday, 28 May *2026, at *16:00* - *_LAGRANGE Lecture 
Hall_***-*https://indico.ictp.it/event/11350/*


Ashish Shukla (Saha Institute of Nuclear Physics, Kolkata)


*“Models for Heavy-Ion Collisions and Carroll Hydrodynamics"*
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_Abstract_

The study of quark-gluon plasma (QGP) and its properties is of 
fundamental significance to the understanding of the strong 
interactions. Heavy-ion collision experiments have shown that the QGP 
behaves like a nearly perfect fluid for part of its evolution before 
eventual hadronization. Using approximate symmetries, such as the boost 
invariance of the flow along the beam axis, the hydrodynamic behaviour 
of the QGP can be studied via simple models such as Bjorken and Gubser 
flow. In this talk, I will present the idea that these simple models are 
actually realizations of what has come to be known as "Carroll 
hydrodynamics," which describes the hydrodynamic behaviour of systems 
with an underlying Carroll boost invariance. In particular, the 
geometric properties of the Carroll manifold map to the phenomenological 
assumptions that are built into these models. The mapping between the 
two is not limited to ideal fluids, and also works after including 
dissipative corrections.

To attend via _*Zoom*_, please *_register_* here:
https://zoom.us/meeting/register/kDWHCYMRSv21BNhKh4WU-g