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UID:5665@i2m.univ-amu.fr
DTSTART;TZID=Europe/Paris:20230622T170000
DTEND;TZID=Europe/Paris:20230622T180000
DTSTAMP:20241124T135515Z
URL:https://www.i2m.univ-amu.fr/evenements/normalizing-renormalization-2-2
 -3/
SUMMARY: (...): Normalizing renormalization (2)
DESCRIPTION:: Renormalization is one of the most powerful conceptual framew
 orks in theoretical physics. Renormalization was first introduced as a sys
 tematic tool for subtracting ultraviolet divergences in perturbative quant
 um field theory at the end of the 1940s. The pioneering work of Kenneth Wi
 lson gave it a physical meaning and tied the relation to statistical physi
 cs. His work dramatically changed the way we think about quantum field the
 ories and earned him the Nobel Prize in 1982. The key idea of the renormal
 ization group is that phenomena at different scales relate to one another.
  The theoretical framework often causes confusion among students attending
  quantum field theory classes (including myself). Here\, I will attempt to
  „normalize renormalization“: I start by a general discussion of „ho
 w we do physics“ and introduce some prerequisites needed in quantum fiel
 d theory. I will then apply the algorithm of „doing physics“ to quantu
 m field theories which leads us to the renormalization group equations. I 
 will focus on a specific „regularization scheme“\, namely lattice regu
 larization\, which naturally provides a momentum cutoff. If time permits i
 t\, I will introduce the concept of perfect actions\, which are lattice ac
 tions whose predictions agree with those of the continuum action\, and thi
 s independently whether the lattice is fine or coarse.\n\n \n\n\n\nLe sé
 minaire des doctorant⋅es de l'I2M et du CPT à Luminy regroupe chaque se
 maine les doctorant⋅es du site autour d'un exposé plus ou moins (in)for
 mel\, dans un cadre convivial. Il est évidemment ouvert aux étudiant⋅e
 s de master et aux doctorant⋅es d'autres laboratoires.\n\nC'est au rez-d
 e-chaussée du bâtiment de « l'ancienne BU »\, dans la salle « Sémina
 ire 2 » (au fond à gauche en sortant de l'escalier si vous venez de l'é
 tage\, au fond à droite si vous entrez par le rez-de-chaussée). Attentio
 n : l'entrée dans le labo nécessite un badge. En cas de souci (de type :
  être bloqué⋅e dehors)\, appeler le 04 91 26 95 91.
CATEGORIES:Séminaire,Rencontres doctorant⋅es I2M-CPT
LOCATION:I2M Luminy - Ancienne BU\, Salle Séminaire2 (RdC)\, 163 Avenue de
  Luminy\, 13009 Marseille\, France\, 
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=163 Avenue de Luminy\, 1300
 9 Marseille\, France\, ;X-APPLE-RADIUS=100;X-TITLE=I2M Luminy - Ancienne B
 U\, Salle Séminaire2 (RdC):geo:0,0
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