Tzvetalina Stavreva
(LPSC)
24/05/2012 09:00
Physique des particules
Parton distribution functions (PDFs) are of supreme importance in modern high energy physics. Firstly, they encode fundamental information on the structure of hadrons as probed in high energy reactions. Moreover, PDFs are an indispensable tool for the computation of cross sections at hadron colliders such as the LHC providing the link between the perturbatively calculable parton level cross...
Akin Wingerter
(LPSC)
24/05/2012 09:40
Physique des particules
We highlight some of the shortcomings of the Standard Model and
explain why we expect to find new physics around the TeV scale at the
Large Hadron Collider (LHC) at CERN. We present some well-motivated
scenarios for physics beyond the Standard Model like supersymmetry,
grand unification, new gauge symmetries, extra dimensions and string
theory, and show how our work at LPSC contributes to...
Suchita Kulkarni
(LPSC)
24/05/2012 10:10
Physique des particules
The ongoing quest for finding what exists beyond the Standard Model of particle physics is driven by many of the observed phenomena like the dark matter, the origin of neutrino masses or the origin of the matter-antimatter asymmetry in the early universe. One of the most elegant extensions of the Standard Model of particle physics is Supersymmetry. It is theoretically well motivated and...
Pasquale Serpico
(LAPTH)
24/05/2012 11:00
I will briefly review the composition and the activities of the astrophysics and cosmology group at LAPTh.
A sketch will be given of two representative topics of research in the two areas, namely indirect dark matter searches (and connections with cosmic ray astrophysics problems) and neutrino cosmology.
Abdelhak Djouadi
(CERN)
24/05/2012 11:20
Physique des particules
Guillaume Drieu la Rochelle
(LAPTH)
24/05/2012 12:10
Physique des particules
Supersymmetry, being one of the most mainstream extensions of the Standard Model, is now being probed to a high level in different experimental studies. Though the direct searches for superpartners at the LHC are still confined to put lower bounds on squarks, it may not be the case in the Higgs sector, and on the other side the experimental searches for dark matter are getting sensitive to the...
Jean-Michel Maillet
(ENS Lyon)
24/05/2012 14:00
Systemes integrables
Jean Avan
(Université de Cergy)
24/05/2012 15:00
Systemes integrables
A major feature of quantum integrable systems is the quantum group structure encapsulated in the Yang Baxter equation RTT = TTR. The presence of boundaries to a quantum integrable system imposes to complement it by the boundary equation RKRK = KRKR. In parallel consistent deformations of the YB algebra have been defined, leading to so-called dynamical Yang Baxter equations. The work presented...
James Drummond
(LAPTh & CERN)
24/05/2012 16:00
Systemes integrables
Nowadays, the notion of integrability is also used in string theories. The celebrated AdS / CFT correspondence conjecture between conformal field theories in four dimensions and string theory in a 11 dimensional space entered a predictive phase, following a tremendous breakthrough made in recent years. This conjecture predicts equivalence between operators in conformal field theories (eg N =...
19.
Positive current cross-correlations in a highly transparent normal-superconducting beam splitter
Régis Melin
(Institut Néel)
24/05/2012 16:30
Systemes integrables
The possibility of realizing in the future a source of spin-entangled pairs of
electrons based on three-terminal normal metal-superconductor-normal metal
structures has aroused considerable interest recently, both theoretical and
experimental. The topic of available experiments is to measure either the
current flowing in one of the normal electrodes in response to a voltage on
the other...
Christoph Schenke
(LPMMC)
24/05/2012 17:00
Systemes integrables
Recent experimental activities of boson trapping on a ring geometry open the way to explore this novel topology. We focus on a tight ring trap with strong transverse confinement leading to an effectively one-dimensional motion along its circumference. We consider a strongly interacting Bose gas on the ring subjected to a localized barrier potential which is suddenly set into motion. The...
Prof.
Ralf Everaers
(Laboratoire de Physique et Centre Blaise Pascal, ENS-Lyon et CNRS)
25/05/2012 09:00
Matiere molle/Biophysique
During interphase chromosomes decondense, but fluorescent in situ hybridization experiments reveal the existence of distinct territories occupied by individual chromosomes inside the nuclei of most eukaryotic cells. We use computer simulations to show that the existence and stability of territories is a kinetic effect that can be explained without invoking an underlying nuclear scaffold or...
Dr
Alice NICOLAS
(Laboratoire des Technologies de la Microelectronique, CEA-CNRS-UJF)
25/05/2012 09:45
Matiere molle/Biophysique
Cell adhesion has attracted the attention of physicists and engineers since it has become apparent that (i) managing it is a prerequisite to organize cells in a synthetic matrix for bioengineering applications, and (ii) that it could not be described with theories designed for dead matter, albeit sophisticated they are. The adhesion of cells to their surrounding medium begins with the...
Dr
Olivier RIVOIRE
(Laboratoire Interdisciplinaire de Physique Université Grenoble I et CNRS)
25/05/2012 11:00
Matiere molle/Biophysique
I will present work aimed at deciphering the relation between the sequence and function of proteins based on the principle of co-evolution. By analyzing statistically large numbers of related sequences, we can infer from this principle the patterns of functional couplings between amino acids in a protein. This analysis reveals a decomposition of proteins into evolutionary units that differs...
Dr
Giovanni FEVERATI
(Laboratoire d'Annecy de physique théorique, CNRS et Université de Savoie)
25/05/2012 11:45
Matiere molle/Biophysique
Living organisms are made of nucleotides (DNA and RNA), lipids and proteins.
All biological activities consist in interactions between those different
entities. Identifying and rationalizing the interaction modes between
partners is therefore crucial for investigating any biological problem.
The interactions are encoded by patterns that are not easily inferred due to
the large number of...
Alex Chin
(University of Cambridge)
25/05/2012 14:00
Energie et thermoelectricite
The interactions between the environment and excitons generated by light harvesting in photosynthetic pigment-protein complexes (PPC) is a key part of the remarkable, often close to 100%, quantum efficiency of solar energy transduction in natural photosynthesis. The environmental fluctuations spectra in PPCs are known to be have significant frequency structure, including strong contributions...
Christophe Delerue
(IEMN, Université de Lille)
25/05/2012 14:45
Energie et thermoelectricite
Carrier-multiplication (CM) is a process in which more than one electron-hole pair is created as the result of the absorption of a single photon. CM in semiconductor quantum dots (QDs) has recently received considerable attention both experimentally and theoretically. But the results are subjects of important controversies and therefore it is still not clear whether CM in QDs has the potential...
Simone Fratini
(Institut Néel)
25/05/2012 16:00
Energie et thermoelectricite
Because of the weakness of van der Waals inter-molecular bonds, organic semiconductors are commonly believed to stand in an intermediate region between the molecular limit and the extended band picture, calling for concepts that go beyond the standard paradigms of inorganic semiconductors. Experimental charge transport and optical studies of organic semiconductors over the past few years have...
Natalio Mingo
(LITEN/LCH, CEA Grenoble)
25/05/2012 16:45
Energie et thermoelectricite
Several novel types of nanostructured materials are emerging as potentially suitable for the development of high ZT thermoelectrics. Amongst them, Nanoparticle Embedded in Alloy Thermoelectric (NEAT) materials, offer a good opportunity for theoretical computations to predict thermoelectric properties and compare with experimental results.
In this talk I will first discuss the theoretical...
