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Thursday 20 April 2017, 10:00 at IHP, 314 RENC-THEO (Rencontres Théoriciennes) hep-th
Vasilis Niarchos ( Durham ) Aspects of Berry phase in QFT
Abstract: Berry phase is a well-known 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 non-trivial 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 re-derivation of the tt* equations. The latter have important implications on the non-perturbative 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) hep-ph
Adam Falkowski ( LPT Orsay ) Effective field theories in particle physics (1/4)
Abstract: (TBA)
Attachments:
  • 2016-2017.pdf (5422338 bytes) OPEN

Monday 24 April 2017, 11:00 at IPHT, Salle Claude Itzykson, Bât. 774 IPHT-PHM (Séminaire de physique mathématique) math-ph
Dmitry Bikov ( IHES ) Complex structures and zero-curvature equations for sigma-models
Abstract: I will construct zero-curvature representations for the equations of motion of a class of sigma-models with complex homogeneous target spaces, not necessarily symmetric. I will also describe a deformation of the principal chiral model (with an even-dimensional target space G) by a B-field proportional to the Kähler form on the target space. The equations of motion of the deformed model admit a zero-curvature representation as well.

Tuesday 25 April 2017, 14:00 at APC, 646 A - Mondrian APC-TH (Seminar of the theory group of APC) hep-th
Debika Chowdhury ( Department of Physics, Indian Institute of Technology Madras, Chennai, India ) Behavior of three-point functions in inflationary and bouncing scenarios
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 so-called bouncing models. In this talk, I shall discuss the evaluation of three-point 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 three-point 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 scalar-scalar-tensor cross-correlation in this model and analytically establish the consistency relation (in the squeezed limit) for this three-point 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 non-Gaussianities, specifically the three-point 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 IPHT-MAT (Séminaire de matrices, cordes et géométries aléatoires) hep-th
Kiril Hristov ( INRNE, Sofiya ) TBA

Friday 28 April 2017, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/167 )
COURS (Cours) hep-ph
Adam Falkowski ( LPT Orsay ) Effective field theories in particle physics (2/4)
Abstract: (TBA)
Attachments:
  • 2016-2017.pdf (5422338 bytes) OPEN

Tuesday 2 May 2017, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th
Günter Sigl ( University of Hambourg ) Chiral electrodynamics in astrophysics and cosmology

Wednesday 3 May 2017, 10:30 at IHES, Centre de conférences Marilyn et James Simons
( Séminaire Mathématique Paris-Tunis )
MATH-IHES (TBA) hep-th
Pierre RaphaËl ( (Université Nice Sophia Antipolis) ) Sur les phénomènes d’explosion énergie sur critique
Abstract: Les problématiques de formation de singularité en équations aux dérivées partielles non-linéaires 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 Paris-Tunis )
MATH-IHES (TBA) hep-th
Hammadi Abidi ( (Faculté des Sciences de Tunis) ) Existence et unicité globales pour le système MHD
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) hep-ph
Adam Falkowski ( LPT Orsay ) Effective field theories in particle physics (3/4)
Abstract: (TBA)
Attachments:
  • 2016-2017.pdf (5422338 bytes) OPEN

Friday 12 May 2017, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/167 )
COURS (Cours) hep-ph
Adam Falkowski ( LPT Orsay ) Effective field theories in particle physics (4/4)
Abstract: (TBA)
Attachments:
  • 2016-2017.pdf (5422338 bytes) OPEN

Tuesday 16 May 2017, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th
Jérôme Gleyzes ( JBL, Caltech ) TBA

Tuesday 23 May 2017, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th
Gary Gibbons ( Cambridge University ) TBA

Friday 2 June 2017, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/168 )
COURS (Cours) cond-mat|quant-ph
Michel Bauer ( IPhT ) An introduction to Markovian open quantum systems (1/5)
Abstract: (TBA)
Attachments:
  • 2016-2017.pdf (5422338 bytes) OPEN

Tuesday 6 June 2017, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th
David Wiltshire ( University of Canterbury, New Zealand ) TBA

Friday 9 June 2017, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/168 )
COURS (Cours) cond-mat|quant-ph
Michel Bauer ( IPhT ) An introduction to Markovian open quantum systems (2/5)
Abstract: (TBA)
Attachments:
  • 2016-2017.pdf (5422338 bytes) OPEN

Tuesday 13 June 2017, 14:00 at APC, 483 A - Malevitch APC-TH (Seminar of the theory group of APC) hep-th
Kalioppi Petraki ( LPTHE, UPMC ) TBA

Friday 16 June 2017, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/168 )
COURS (Cours) cond-mat|quant-ph
Michel Bauer ( IPhT ) An introduction to Markovian open quantum systems (3/5)
Abstract: (TBA)
Attachments:
  • 2016-2017.pdf (5422338 bytes) OPEN

Friday 23 June 2017, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/168 )
COURS (Cours) cond-mat|quant-ph
Michel Bauer ( IPhT ) An introduction to Markovian open quantum systems (4/5)
Abstract: (TBA)
Attachments:
  • 2016-2017.pdf (5422338 bytes) OPEN

Friday 30 June 2017, 10:00 at IPHT, Salle Claude Itzykson, Bât. 774
( https://courses.ipht.cnrs.fr/?q=fr/node/168 )
COURS (Cours) cond-mat|quant-ph
Michel Bauer ( IPhT ) An introduction to Markovian open quantum systems (5/5)
Abstract: (TBA)
Attachments:
  • 2016-2017.pdf (5422338 bytes) OPEN

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