Today
11h00 Séminaire de physique mathématique
Séminaire de physique mathématique
Salle Claude Itzykson, Bât. 774 Orme des Merisiers
J.S. Caux
14h00 Séminaire de physique statistique
Séminaire de physique statistique
Salle Claude Itzykson, Bât. 774 Orme des Merisiers
Darius Sadri
Tuesday, Mar 31, 2015
14h15 Séminaire de matrices, cordes et géométries aléatoires
Séminaire de matrices, cordes et géométries aléatoires
Salle Claude Itzykson, Bât. 774 Orme des Merisiers
Mirela Babalic
Friday, Apr 03, 2015
10h00 Cours de physique théorique
Cours de physique théorique
Salle Claude Itzykson, Bât. 774 Orme des Merisiers
Filippo Vernizzi
Tuesday, Apr 07, 2015
11h00 Séminaire de vulgarisation
Séminaire de vulgarisation
Salle Claude Itzykson, Bât. 774 Orme des Merisiers
Kirone Mallick
Wednesday, Apr 08, 2015
14h15 Séminaire hadronique et des particules
Séminaire hadronique et des particules
Salle Claude Itzykson, Bât. 774 Orme des Merisiers
Federico Piazza
The research performed at the IPhT aims at better understanding the laws which govern our universe and its organisation. It encompasses most of the great subjects of modern theoretical physics:
The IPhT comprises about fifty permanent physicists (2/3 CEA, 1/3 CNRS), about thirty PhD students and postdocs, assisted by a support staff of about ten people. The IPhT also hosts permanently many short term visitors.
In 1981, the famous theoretician A. Polyakov introduced the quantum Liouville theory as a model for the quantized string. This theory “quantizes” the Liouville equation R=1 of classical geometry, which characterizes Riemann surfaces with negative curvature. It is thus a quantum theory of gravity, where the geometry of a two dimensional spacetime in quantized (1 time dimension + 1 space dimension). Liouville theory has remarkable properties. It is a conformal theory (it is endowed with an infinite symmetry group, the same as for string theories and critical systems such as the Ising model in two dimensions). Liouville theory appears, sometimes unexpectedly, in many problems of theoretical physics and of pure mathematics. It has been therefore very much studied via the methods of Conformal Field Theory and of Integrable Systems. But it is also related, in a deep but still partially understood way, to combinatorial models where spacetime is discretized as a random lattice (random maps, matrix models). In these two approaches (continuous and discrete) the IPhT has brought major contributions. Recently a third player entered this arena: probability theory! It already led to a better ... 

C. Pepin, 20150224

The 20th Itzykson Conference will be held at the Institute of Theoretical Physics in Saclay from June 10 to 12, 2015. This annual conference, honouring the memory of the famous theoretical physicist Claude Itzykson, will be devoted this year to Random Surfaces and Random Geometry and will cover the following topics : The list of speakers, registration form, and further practical information, are available on the webpage : https://indico.in2p3.fr/event/10750/ Looking forward to seeing you in Saclay in June, The organizers, Jérémie Bouttier, François David and Bertrand Eynard 

F. David, 20150220

Quarks and gluons are abundantly produced in the final state of the LHC collisions. They are observed as collimated showers of particles, known as jets. Jets are crucial objects in particle physics, used e.g. in about 60% of the LHC analyses. In practice, jets need to be reconstructed from the particles in the final state using a jet algorithm (the antikt algorithm [1] at the LHC). This, as well as all sorts of manipulations on jets  e.g. calculating their area, subtracting soft contamination or studying their internal (sub)structure  is done numerically. FastJet [2], developed by Matteo Cacciari, Gavin Salam and Gregory Soyez, is the computer interface used by the highenergy community to perform this fundamental task. With hundreds of events recorded every second at the LHC, time is of the essence. For event reconstruction at the LHC, jet clustering is the second most timeconsuming step (right after reconstructing ... 

P. Brax, 20150203

Uncovering the spatial structure of mobility networks
Spin Vertex and 3 Point Function in AdS/CFT Correspondence
Hélène Dupuy receives a "L'Oréal  UNESCO for women in science" fellowship
Roger Balian and François David interviewed on quantum physics
Robi Peschanski on air on France Culture
Marco Cirelli awarded the Thibaud Prize of the académie de Lyon