A5061834712- Advanced Chemical Physics Studies
- Laser-Matter Interactions and Applications
- Spectroscopy and Quantum Chemical Studies
- Atomic and Molecular Physics
- High-Energy Particle Collisions Research
- Laser-induced spectroscopy and plasma
- Ion-surface interactions and analysis
- Mass Spectrometry Techniques and Applications
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- Advanced Physical and Chemical Molecular Interactions
- Cold Atom Physics and Bose-Einstein Condensates
- nanoparticles nucleation surface interactions
- Fullerene Chemistry and Applications
- Quantum, superfluid, helium dynamics
- Molecular Junctions and Nanostructures
- Nuclear reactor physics and engineering
- Chemical Thermodynamics and Molecular Structure
- Chemical and Physical Properties of Materials
- Electron and X-Ray Spectroscopy Techniques
- Photochemistry and Electron Transfer Studies
- Free Radicals and Antioxidants
- Copper-based nanomaterials and applications
- Magnetic confinement fusion research
Laboratoire de Physique Théorique
2015-2024
Université Toulouse III - Paul Sabatier
2014-2024
Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes
2013-2024
Université de Toulouse
2012-2023
Centre National de la Recherche Scientifique
2010-2023
Bipar
2015-2021
Michigan State University
2010-2011
National Superconducting Cyclotron Laboratory
2010
Joint Institute for Nuclear Astrophysics
2010
Friedrich-Alexander-Universität Erlangen-Nürnberg
2008
We present a new method for analyzing directed and elliptic flow in heavy-ion collisions. Unlike standard methods, it separates the contribution of to azimuthal correlations from contributions due other effects. The separation relies on cumulant expansion multiparticle correlations, includes corrections detector inefficiencies. This allows measurement identified particles narrow phase-space regions, can be used every regime, intermediate ultrarelativistic energies.
The methods currently used to measure azimuthal distributions of particles in heavy ion collisions assume that all correlations between result from their correlation with the reaction plane. However, other exist, and it is safe neglect them only if anisotropies are much larger than 1/sqrt(N), N total number emitted collision. This condition not satisfied at ultrarelativistic energies. We propose a new method, based on cumulant expansion multiparticle correlations, which allows smaller values...
Equilibration and equilibration rates have been measured by colliding Sn nuclei with different isospin asymmetries at beam energies of E/A=35 MeV. Using the yields mirror 7Li 7Be, we studied diffusion asymmetry combining data from asymmetric 112Sn+124Sn 124Sn+112Sn collisions that symmetric 112Sn+112Sn 124Sn+124Sn collisions. We use these measurements to probe in central where nucleon-nucleon are strongly blocked Pauli exclusion principal. The results consistent transport theoretical...
The NA50 Collaboration has recently observed that the J/psi production rate in Pb-Pb collisions decreases more rapidly as a function of transverse energy for most central than less ones. We show this phenomenon can be understood an effect fluctuations collisions. A good fit data is obtained using model which relates suppression to local density. Our results suggest completely suppressed at highest densities achieved
We investigate from a practitioner's point of view the computation ionization potential (IP) within density functional theory (DFT). DFT with (semi-)local energy-density functionals is plagued by self-interaction error which hampers IP single-particle energy highest occupied molecular orbital (HOMO). The problem may be cured self interaction correction (SIC) for there exist various approximate treatments. compare performance SIC proposed Perdew and Zunger very simple average-density (ADSIC)...
Expensive multi-objective optimization problems (EMOPs) are common in real-world scenarios where evaluating objective functions is costly and involves extensive computations or physical experiments. Current Pareto set learning methods for such often rely on surrogate models like Gaussian processes to approximate the functions. These can become fragmented, resulting numerous small uncertain regions between explored solutions. When using acquisition as Lower Confidence Bound (LCB), these turn...
We discuss an implementation of the self-interaction correction for local-density approximation to time-dependent density-functional theory. A variational formulation is given, taking care necessary constraints. manageable and transparent propagation scheme using two sets wave functions proposed applied laser excitation with subsequent ionization a dimer molecule.
This combined experimental and theoretical study demonstrates that the surface plasmon resonance in ${\mathrm{C}}_{60}$ alters valence photoemission quantum phase, resulting strong effects photoelectron angular distribution emission time delay. Electron momentum imaging spectroscopy is used to measure asymmetry parameter agrees well with our calculations from time-dependent local density approximation (TDLDA). Significant structure delay simultaneously calculated by TDLDA over active...
What do atomic nuclei, neutron stars, a domestic power supply, and the stunning colors of stained glass in cathedrals all have common? The answer lies unifying concept quantum fluids, which allows us to understand behavior properties these different systems simple terms. This book reveals how mechanics, usually considered as restricted invisible microscopic world, fact plays crucial role at scales universe. purpose is introduce reader fascinating multifaceted world covers physical world....
The directed flow of particles produced in ultrarelativistic heavy ion collisions at SPS and RHIC is so small that currently available methods analysis are the border applicability. Standard two-particle flow-vector biased by large nonflow correlations. On other hand, cumulants four-particle correlations, which free from this bias, plagued statistical errors. Here, we present a new method based on three-particle uses property elliptic these energies. This may also be useful intermediate...
Collisions involving 112Sn and 124Sn nuclei have been simulated with the improved Quantum Molecular Dynamics transport model. The results of calculations reproduce isospin diffusion data from two different observables ratios neutron proton spectra. By comparing these to performed over a range symmetry energies at saturation density representations dependence energy, constraints on energy sub-normal are obtained. Results present work compared put forward in other recent analysis.
We study from a theoretical perspective the ionization of molecules and clusters induced by irradiation combined two-color laser field consisting train attosecond XUV pulses in presence an IR field. use time-dependent density-functional theory (TDDFT) real time space as tool. The calculated results are compared to experimental data when available. also compare TDDFT with obtained using Schrödinger equation (TDSE), which is well suited simple systems while allows dealing more complex...
Abstract In the framework of time‐dependent local density approximation, applied to valence electrons, coupled nonadiabatically molecular dynamics ions, irradiations ethylene by laser and fast charged projectiles are studied. We find that Coulomb fragmentation sensitively depends on frequency charge projectile. © 2010 Wiley Periodicals, Inc. Int J Quantum Chem, 2011
We explore, from a theoretical perspective, photoelectron angular distributions (PADs) of the Na clusters Na${}_{8}$, Na${}_{10}$, Na${}_{12}$, Na${}_{18}$, Na${}_{3}{}^{+}$, Na${}_{11}{}^{+}$, Na${}_{13}{}^{+}$, and Na${}_{19}{}^{+}$. The basis description is time-dependent local-density approximation (TDLDA), augmented by self-interaction correction (SIC) to describe ionization properties correctly. scheme solved on numerical grid in coordinate space with absorbing bounds. assume for each...
In the frame of time-dependent local-density approximation coupled nonadiabatically to molecular dynamics (MD), we explored optical absorption strength and a water dimer in intense laser pulses with different intensities. The spectra exhibiting well marked isolated peaks agrees results obtained by ab initio MD simulations. Three typical possible reaction paths are exhibited, which normal oscillation, OH bond break Coulomb explosion, respectively. ionic motion shows that donor bonded more...
We discuss extensions of time-dependent mean-field theories such as local density approximation (TDLDA) in order to include incoherent dynamical correlations, which are known play a key role far-off equilibrium dynamics. focus here on the case irradiation dynamics clusters and molecules. The field, still largely unexplored, requires quantum approaches represents major formal computational effort. present several we have investigated address an issue. start with current-density functional...