[Theory-seminars] Theory Seminar Feb. 5 - Mithat Unsal

[Andrea Signori]

Theory Seminar
Monday, February 5
1:00pm - CEBAF Center, Room L102
Mithat Unsal (NCSU): Aspects of resurgence and Picard-Lefchetz theory in 
QFT

Abstract:

Recent works show that there may indeed exist a
non-perturbative continuum definition of quantum field theory (QFT),
at least in some interesting regimes.
I will describe some new ideas from mathematics and physics,
in particular, the  resurgence theory, the trans-series framework from
mathematics and the idea of adiabatic continuity from physics to provide new insigths
into the structure of general QFTs.  The new techniques allow us to
determine new saddle points which play important dynamical roles, e.g.  in confinement,
theta-dependence in semi-classically calculable domains. It also
provides new insights into the nature of IR-renormalon problem. In a
wide class of quantum mechanical systems, these techniques show that
all non-perturbative data is secretly encoded in perturbation theory.


The link to remotely connect via bluejeans is available at 
https://www.jlab.org/div_dept/theory/seminars/2018-spring-theory-seminar.html
The (partial) schedule for the next seminars is available at the same page.

Looking forward to seeing you,

     Alessandro, Andrea, Bipasha

-- 
Postdoctoral researcher
Theory Center - Jefferson Lab
12000 Jefferson Avenue,
Newport News, VA 23606 USA
CEBAF center, office A211
Tel: +1 (757) 269-6735
https://userweb.jlab.org/~asignori