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Thursday 20 April 2017, 10:00 at IHP, 314  RENCTHEO (Rencontres Théoriciennes)  hepth 



Abstract:  Berry phase is a wellknown feature of quantum mechanics. In this talk I will describe several new results about Berry phase in quantum field theory. We will see that even simple quantum field theories can exhibit nontrivial Berry phases and will discuss an explicit example in axion electrodynamics. We will also discuss a general relation between the Berry connection in conformal field theories and the connections on conformal manifolds considered previously by several authors in conformal perturbation theory. The implementation of this relation in 2d N=(2,2) and 4d N=2 superconformal field theories leads to a useful rederivation of the tt* equations. The latter have important implications on the nonperturbative structure of certain correlation functions, which I will briefly review. 
Friday 21 April 2017, 10:00 at
IPHT,
Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/167 )  COURS (Cours)  hepph 



Abstract:  (TBA)  
Attachments: 
Monday 24 April 2017, 11:00 at IPHT, Salle Claude Itzykson, Bât. 774  IPHTPHM (Séminaire de physique mathématique)  mathph 



Abstract:  I will construct zerocurvature representations for the equations of motion of a class of sigmamodels with complex homogeneous target spaces, not necessarily symmetric. I will also describe a deformation of the principal chiral model (with an evendimensional target space G) by a Bfield proportional to the Kähler form on the target space. The equations of motion of the deformed model admit a zerocurvature representation as well. 
Tuesday 25 April 2017, 14:00 at APC, 646 A  Mondrian  APCTH (Seminar of the theory group of APC)  hepth 



Abstract:  Inflation has been widely regarded as the most promising scenario to explain our observations of the early universe. However, in view of the difficulties associated with arriving at a unique model of inflation, it seems worthwhile to investigate alternative scenarios of the early universe, specifically the socalled bouncing models. In this talk, I shall discuss the evaluation of threepoint functions in a specific inflationary model and a particular class of bouncing models in order to illustrate the primary differences that can arise between these two scenarios at the level of the threepoint functions. I shall consider the axion monodromy model of inflation, which involves a canonical scalar field that is governed by a linear potential with superimposed modulations. I shall discuss the evaluation of the scalarscalartensor crosscorrelation in this model and analytically establish the consistency relation (in the squeezed limit) for this threepoint function. I shall then consider a specific class of bouncing models, namely the matter bounce scenario, and discuss the analytical evaluation of the tensor modes and the tensor bispectrum in this scenario. Further, I shall show that the consistency relation corresponding to the tensor bispectrum is violated in the matter bounce. The behavior of the nonGaussianities, specifically the threepoint functions, generated in the inflationary and bouncing scenarios can hence be used to compare and contrast between the predictions of these alternative models of the early universe. 
Wednesday 26 April 2017, 14:15 at IPHT, Salle Claude Itzykson, Bât. 774  IPHTMAT (Séminaire de matrices, cordes et géométries aléatoires)  hepth 


Friday 28 April 2017, 10:00 at
IPHT,
Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/167 )  COURS (Cours)  hepph 



Abstract:  (TBA)  
Attachments: 
Tuesday 2 May 2017, 14:00 at APC, 483 A  Malevitch  APCTH (Seminar of the theory group of APC)  hepth 


Wednesday 3 May 2017, 10:30 at
IHES,
Centre de conférences Marilyn et James Simons ( Séminaire Mathématique ParisTunis )  MATHIHES (TBA)  hepth 



Abstract:  Les problématiques de formation de singularité en équations aux dérivées partielles nonlinéaires sont au coeur d'une dynamique de recherche intense ces vingt dernières années. Je présenterai quelques résultats récents concernant la construction de solutions explosives dans le cadre dit énergie sur critique. Dans le cas parabolique, je présenterai notamment la construction de toutes nouvelles bulles a géométrie fortement anisotrope. 
Wednesday 3 May 2017, 11:45 at
IHES,
Centre de conférences Marilyn et James Simons ( Séminaire Mathématique ParisTunis )  MATHIHES (TBA)  hepth 



Abstract:  Le but de l'exposé est de présenter un résultat d'existence et d'unicité globales pour le système magnétohydrodynamique incompressible en 3D pour des données initiales assez proches de l'état d'équilibre e_3=(0,0,1). 
Friday 5 May 2017, 10:00 at
IPHT,
Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/167 )  COURS (Cours)  hepph 



Abstract:  (TBA)  
Attachments: 
Friday 12 May 2017, 10:00 at
IPHT,
Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/167 )  COURS (Cours)  hepph 



Abstract:  (TBA)  
Attachments: 
Tuesday 16 May 2017, 14:00 at APC, 483 A  Malevitch  APCTH (Seminar of the theory group of APC)  hepth 


Tuesday 23 May 2017, 14:00 at APC, 483 A  Malevitch  APCTH (Seminar of the theory group of APC)  hepth 


Friday 2 June 2017, 10:00 at
IPHT,
Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/168 )  COURS (Cours)  condmatquantph 



Abstract:  (TBA)  
Attachments: 
Tuesday 6 June 2017, 14:00 at APC, 483 A  Malevitch  APCTH (Seminar of the theory group of APC)  hepth 


Friday 9 June 2017, 10:00 at
IPHT,
Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/168 )  COURS (Cours)  condmatquantph 



Abstract:  (TBA)  
Attachments: 
Tuesday 13 June 2017, 14:00 at APC, 483 A  Malevitch  APCTH (Seminar of the theory group of APC)  hepth 


Friday 16 June 2017, 10:00 at
IPHT,
Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/168 )  COURS (Cours)  condmatquantph 



Abstract:  (TBA)  
Attachments: 
Friday 23 June 2017, 10:00 at
IPHT,
Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/168 )  COURS (Cours)  condmatquantph 



Abstract:  (TBA)  
Attachments: 
Friday 30 June 2017, 10:00 at
IPHT,
Salle Claude Itzykson, Bât. 774 ( https://courses.ipht.cnrs.fr/?q=fr/node/168 )  COURS (Cours)  condmatquantph 



Abstract:  (TBA)  
Attachments: 

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