High Energy Physics Seminar by Suman Majumdar this week - POSTPONED to 14th July in Lagrange LH

[HECAP - Margherita Di Giovannantonio]

*_HIGH ENERGY PHYSICS SEMINARS_*
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*Please note new date and venue for the seminar by Suman Majumdar 
scheduled to take place this week*
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*Tuesday, 14 July *2026, at *16:00* - *_Lagrange Lecture 
Hall_***-*https://indico.ictp.it/event/11326/*


Suman Majumdar (Indian Institute of Technology Indore)


*“ 'Emulator is all you need' for the Reionization Inference With SKA-Low "*
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_Abstract_

The cosmologically redshifted 21-cm signal originating from the neutral 
hydrogen distribution during the Epoch of Reionization (EoR) provides a 
direct probe to the state of the intergalactic medium in this formative 
phase of our Universe. The upcoming Square Kilometre Array (SKA-Low) is 
expected to observe this signal with unprecedented sensitivity and 
resolution. However, interpretation of such observations is complex due 
to the strong inherent and evolving non-Gaussian nature of the signal.

In this talk, I will discuss our efforts towards the development of 
machine learning based 21-cm signal emulators designed to accelerate 
parameter inference by circumventing expensive simulations of this 
signal. Starting with the development of emulators based on Neural 
Networks for different summary statistics of the signal e.g. power 
spectrum and bispectrum, conditioned on reionization model parameters, 
we have recently developed CosmoUiT, a hybrid Vision Transformer-UNet 
architecture that emulates the entire time evolving 21-cm field as 
expected to be observed by the upcoming SKA-Low. CosmoUiT is orders of 
magnitude faster than simulations—while maintaining high fidelity to 
emulated maps--enabling field-level inference for future SKA observations.

To attend via _*Zoom*_, please *_register_* here:
https://zoom.us/meeting/register/9pRHed56TzSLxb3eDeajLw