ELFT HÍRADÓ

[somogyi <somogyi.gabor AT wigner.hu>]

Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk


                  Ramon Miravitllas Mas
                  (University of Geneva)


"Structure of trans-series in quantum field theory"


     címmel tartandó szemináriumára.


Kivonat:



Perturbative series in quantum field theory are factorially divergent 
and must be completed with exponentially small corrections in the 
coupling, which also come with their own factorially divergent series. 
The object that incorporates the perturbative series plus all 
exponential corrections is known as trans-series. After Borel summing 
all the divergent series into a convergent result, one still has to sum 
over the exponentially small parameter of the trans-series, and the 
convergence of this sum must also be analyzed. In this talk, I will 
review what is known about the convergence of the trans-series in 
quantum field theories, by considering general phenomenological 
arguments. Then I will compare these general expectations with a 
concrete example in integrable quantum field theories, where we can 
analytically compute the trans-series of a special quantity, the free 
energy, from the Bethe ansatz equations.




Helye: Wigner FK RMI III. ép. Tanácsterem
Ideje: 2023 január 13 péntek  d.u. 13 óra (SZOKÁSOSTÓL ELTÉRŐ IDŐPONT!)

Szívesen látunk minden érdeklődőt.


                             Somogyi Gábor