Institut de Physique Théorique
Direction de la Recherche Fondamentale  -  Saclay
UMR 3681 - INP
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Friday, April 28, 2017

Welcome to IPhT

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Agenda

Today

10h00 Cours de physique théorique de Saclay

Cours de physique théorique de Saclay

Orme des Merisiers - Salle Claude Itzykson, Bât. 774 Orme des Merisiers

Adam Falkowski

14h00 Séminaire de physique des particules et de cosmologie

Séminaire de physique des particules et de cosmologie

Orme des Merisiers - Salle Claude Itzykson, Bât. 774 Orme des Merisiers

Andrzej Czarnecki

Wednesday, May 03, 2017

14h15 Séminaire de matrices, cordes et géométries aléatoires

Séminaire de matrices, cordes et géométries aléatoires

Orme des Merisiers - Salle Claude Itzykson, Bât. 774 Orme des Merisiers

Charles Strickland-Constable

Friday, May 05, 2017

10h00 Cours de physique théorique de Saclay

Cours de physique théorique de Saclay

Orme des Merisiers - Salle Claude Itzykson, Bât. 774 Orme des Merisiers

Adam Falkowski


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The Institut de Physique Théorique (IPhT) is a laboratory of fundamental research, located in Saclay, about 20 km south-west of Paris.

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.

News

Large deviations of a tracer in the symmetric exclusion process   

A particle in a one-dimensional channel with excluded volume interaction displays anomalous single-file diffusion with fluctuations scaling as t^(1/4) in the long time limit. This phenomenon has been demonstrated in various experiments involving different types of physical systems such as zeolites, capillary pores, carbon nanotubes or colloids. On a one dimensional lattice, the Symmetric Exclusion Process, particles performing symmetric random walks and interacting by hard-core exclusion, is a pristine model of a single-file diffusion, amenable to quantitative analysis (Spitzer, 1970). At equilibrium, the variance of the position of a tagged particle has been calculated exactly by Arratia in 1983, and this result has been discussed since then in numerous theoretical papers, at various levels of physical intuition or mathematical rigor. However, the full distribution of a tagged particle and its higher cumulants (prone to experimental measurements) are not known. A rigorous work by S. Sethuraman et S. R. S. ...

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J. Luck, 2017-04-20

 

Cirano De Dominicis 1927 - 2017   

imgIt was with great sadness that we learned of the death of Cirano de Dominicis on April 4, 2017, at the age of 90 years.

Cirano de Dominicis, a former student of  École polytechnique and of Ecole des Mines, spent his entire career at the Atomic Energy Commission, where he participated in the founding of the theoretical physics group at Saclay. An outstanding scientist, his innovative work had profoundly influence on the fields of condensed matter physics, of the N-body problem, and later on the physics of disordered systems and spi glasses. He was Director of the Saclay theory group (then Service de Physique Théorique) from 1971 to 1979. He has been President of the French Society of Physics, and was the recipient of the Paul Langevin and Ricard Prizes of the French Society of Physics and of  the CNRS Silver Medal. He continued his research activities at the Institute and to be involved in scientific life with impressive energy, until ...

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F. David, 2017-04-06

 

String Theory D3-brane constructions of physics beyond the Standard Model ruled out by the LHC   
imgThe standard model of particle physics arises in string theory from open strings ending on membranes (D-branes) extended along the three-dimensional space. Closed strings propagating along the whole ten-dimensional world of string theory play the role of the hidden sector, communicating to the matter sector the breaking of supersymmetry that takes place in the extra dimensions in the form of “soft terms” (which have this name because they break supersymmetry without causing ultraviolet divergences).
However, not any soft-supersymmetry-breaking Lagrangian can be obtained this way since the string theory equations of motion and consistency conditions impose relations between the soft couplings. Iosif Bena, Mariana Graña and collaborators have shown that for models realized on D3-branes the trace of the square of the boson mass matrix is equal to the trace of the square of the fermion mass matrix at tree level, and this equality holds at least up to two loops [1].  String theory thus dictates ...

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C. Pepin, 2017-03-22

 

Ecole de Physique: "Exact methods in low-dimensional statistical Physics"

Non-unitary ``Quantum mechanics''

Conference about the origins of Gravity

22ème conférence Itzykson, manipulation of simple quantum systems, June 6-8 2017

Beg Rohu 2017 "Out of Equilibrium Dynamics, Evolution and Genetics"

Succession of the IPhT's Head

¨Le Monde¨ 2016 Research Prize for Rémi Louf

2016 Philippe Meyer Prize in Theoretical Physics for Lenka Zdeborova

2016 Thibaud Prize for Gregory Soyez

Abragam prize of the National Academy of Sciences for Cristina Bena

Duncan Haldane, Nobel laureate in Physics in 2016, was a visitor at IPhT


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