Particle theory seminar: Zuhair Khandker (UIUC) “RG Flow from phi^4 Theory to the 2D Ising Model”

Event time: 
Tuesday, April 18, 2017 - 3:30pm to 4:30pm
Sloane Physics Laboratory (SPL), 52 See map
217 Prospect St.
New Haven, CT 06511
Event description: 

“RG Flow from phi^4 Theory to the 2D Ising Model”

We study 1+1 dimensional phi^4 theory using the recently proposed method of conformal truncation. In this method, CFT data is used to perform controlled, numerical computations in strongly-coupled QFTs, in any spacetime dimension. We compute non-perturbative spectral densities of several local operators, which are equivalent to real-time, infinite-volume correlation functions. These spectral densities, which include the Zamolodchikov C-function along the full RG flow, are calculable at any value of the coupling. Near criticality, our numerical results reproduce correlation functions in the 2D Ising model.