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 2017-18/
Seminari A.A. 2017-2018
 
 
I Seminari si svolgono il martedì alle 14:30 nell'aula 311 del Dipartimento di Matematica (salvo diversa indicazione)
  
 
Relatore
Titolo
Data
  
 
 
Michele Correggi
Università "La Sapienza"
Quasi-classical limit for quantum particle-field systems
22 Maggio 2018
  
 
 
Serena Cenatiempo
GSSI L'Aquila
Bogoliubov theory in the Gross-Pitaevskii regime
15 Maggio 2018
  
 
 
Margherita Disertori
University of Bonn
Supersymmetry and Ward identities
as a tool to study functional integrals
8 Maggio 2018
  
 
 
Vieri Mastropietro
Università di Milano
Bulk-Edge correspondence in interacting spin Hall insulators
17 Aprile 2018
  
 
 
Alfonso Sorrentino
Università Tor Vergata
On Birkhoff conjecture for convex billiards
12 Aprile 2018
(giovedì)
  
 
 
Martin Tassy
University of California
Variational principles for discrete maps
06 Febbraio 2018
  
 
 
Monia Capanna
Università dell'Aquila
Turing instability in a model with two interacting Ising lines
31 Gennaio 2018
(mercoledì ore 11:30 Aula 211)
  
 
 
Alexandre Efremov
École Polytechnique
Palaiseau
Renormalization in QFTs
30 Gennaio 2018
  
 
Abstract
ritorna
The problem of perturbative renormalization of φ4 and Yang-Mills theories is studied in four dimensional Euclidean space. The analysis is based on the Functional Renormalization group. This is a unified approach which permits to study a large class of field theories without recourse to Feynman diagrams. An important part of the work consists in establishing upper bounds in momentum space on all vertex functions at all loop orders. These bounds have a very natural graphical interpretation in form of trees. In Yang-Mills theory introduction of ultraviolet (UV) and infrared (IR) cut-offs breaks BRST invariance. Thus it is essential to prove at all loop orders that the construction can be accomplished in such a way that BRST invariance is restored when the UV cut-off goes to infinity. As a useful application we derive the violated Slavnov Taylor identities for the effective action in the Maximal Abelian Gauge and show the existence of the gluon condensate in the effective low energy theory obtained in one loop. We also consider the renormalization of the stochastic singular PDE for the Gross-Neveu-Yukawa interaction in two dimensional Euclidean space using the theory of regularity structures.
 
 
 
Yinon Spinka
Tel Aviv University
A condition for long-range order in discrete spin systems
26 Gennaio 2018
(venerdì)
  
 
 
Eric Ossami Endo
Universidade
de São Paulo
Ferromagnetic Spin models
with spatially dependent external fields
23 Gennaio 2018
  
 
 
N.J.B. Aza
Universidade
de São Paulo
On large deviation principles and lattice Fermion systems
22 Gennaio 2018
(lunedì ore 11:30)
  
 
 
Clément Erignoux
IMPA
Duality and macroscopic evolution
of nonequilibrium boundary-driven lattice gases
9 Gennaio 2018
  
 
 
Domenico Monaco
Università Roma Tre
Adiabatic currents for interacting electrons on a lattice
21 Novembre 2017
  
 
 
Eris Runa
Max Planck Institut
Exact periodic stripes for minimizers of a local/non-local
interaction functional in general dimension
14 Novembre 2017
  
 
 
Hugo Duminil-Copin
IHES
Sharpness of the phase transition via randomized algorithms
7 Novembre 2017
  
 
 
Fabio Toninelli
Université Lyon 1
Interface growth models in the Anisotropic KPZ class
17 Ottobre 2017
  
 
 
Suren Pogosian
Armenian Academy
of Sciences
Limiting cluster representation
04 Ottobre 2017
(mercoledì aula 211)