REMINDER - High Energy Physics Seminar TODAY - Yuan Xin

[HECAP - Margherita Di Giovannantonio]

*_HIGH ENERGY PHYSICS SEMINARS_**__*


*Tuesday, 2 September *2025, at *16:00* - *Stasi Seminar Room****- 
https://indico.ictp.it/event/11102/*


Yuan Xin (Carnegie Mellon University)



*“Yang-Lee Criticality in Various Dimension"*
*
*

_Abstract_
Yang-Lee criticality is the simplest non-Hermitian conformal field 
theory. The model was first reported as a phase transition of Ising 
model in imaginary longitudinal magnetic field more than half a centry 
ago. Since then, many qualitative and quantitative properties of YL 
criticality have been studied, remarkably, including the fact that the 
model can be described in Landau-Ginzburg scheme with a scalar $i\phi^3$ 
theory in $D<6$ and the fact that the 2D version is an exactly solvable 
minimal model. In higher dimensions, the model lacks the same level of 
understanding as the Ising criticality due to its non-Hermitian nature. 
We report a new study of 3D YL criticality as a phase transition of 
Fuzzy Sphere model, which facilitates a direct survey of many quantities 
such as the spectrum and OPE coefficient to high precision. These 
quantitative results show a beautiful agreement with conformal symmetry 
and previous estimates from $(6-\epsilon)$ expansion, high temperature 
expansion and conformal bootstrap. We also discuss possible approaches 
in dimensions higher than 3.

To attend via _*Zoom*_, *please _register_ here*:
https://zoom.us/meeting/register/7cJh--27TAiHIhyfABv4Ow 
<https://zoom.us/meeting/register/7cJh--27TAiHIhyfABv4Ow>