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[Fizinfo] [Rmkiusers] Wigner FK RMI Elméleti Osztály Szemináriuma

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  • From: Somogyi Gábor <somogyi.gabor AT>
  • To: rmkiusers AT, fizinfo AT
  • Subject: [Fizinfo] [Rmkiusers] Wigner FK RMI Elméleti Osztály Szemináriuma
  • Date: Tue, 13 Feb 2024 08:53:09 +0100
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Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk

Ramon Miravitllas Mas
(HUN-REN Wigner RCP)

"Trans-series from condensates”

címmel tartandó szemináriumára.


Perturbation theory fails to describe the low-energy phenomenology of QCD,
like confinement, the mass gap, and the masses of hadrons. Invoking the
Wilson’s operator expansion, one can extend perturbative expansions to
trans-series, which contain some non-perturbative information encoded in the
vacuum condensates. Motivated by this, we will discuss the Gross--Neveu
model, a toy QFT of N fermions in 1+1 dimensions which shares some of the
non-perturbative properties of QCD. This toy model is amenable to some exact
results when the number of fermions N is large. In particular, the two-point
function of the fermions can be computed exactly at the first non-trivial
order in 1/N. We then compare this result with a direct computation of the
first coefficients of the Wilson’s operator expansion, also at large N, and
find a perfect match. This provides a precise test for the validity of the
operator expansion and the methods used to compute its coefficients.

Helye: Wigner FK RMI III. ép. Tanácsterem
Ideje: 2024 február 16. péntek d.u. 2 óra

Szívesen látunk minden érdeklődőt.

Somogyi Gábor

  • [Fizinfo] [Rmkiusers] Wigner FK RMI Elméleti Osztály Szemináriuma, Somogyi Gábor, 02/13/2024

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