Day 2 :
York University, Canada
Time : 09:30-10:10
William A Van Wijngaarden has completed his graduation in 1986 from Princeton University. After spending a year as a Research Associate at Yale University, he joined as the faculty at York University in 1988. Currently, he is working as a Professor of Physics at York University. He is the recipient of several scholarships and awards, including the University of Windsor's Board of Governor's Medal, the 1967 NSERC Graduate Scholarship, the Joseph Henry Scholarship from Princeton University and a considerable number of sizable research grants. Recently, he was chosen to be a member of the NSERC General Physics Grant Selection Committee. His research interests include a variety of topics in pure and applied physics, such as laser isotope separation, laser cooling, atom trapping and environmental monitoring of pollutants, electromagnetically induced transparency for use in optical switching.
High resolution laser spectroscopic measurements of transition frequencies, isotope shifts, etc., are now at a level that they are sensitive to the charge radius of the nucleus. Hence, the recent interest in the discrepancies in the determination of the proton charge radius. A number of experiments have employed novel spectroscopic techniques to measure isotope shifts for several transitions at optical frequencies for the stable and radioactive lithium isotopes. These data offer an important test of theoretical techniques developed by several groups to accurately calculate QED effects and the finite nuclear size in 2 and 3 electron atoms. Theory and experiment have studied several transitions in both Li+ and neutral lithium. The work by multiple groups permits a critical examination of the consistency of separately, the experimental work as well as theory. Combining measured isotope shifts with calculated energy shifts passing these consistency tests, permits the determination of the relative nuclear charge radius with an uncertainty approaching 1x10-18meter. These results are about two orders of magnitude more accurate than those obtained by electron scattering experiments and give insight into the mass and charge distributions of the nuclear constituents.
Joint Institute for High Temperatures-Russian Academy of Sciences, Russia
Time : 10:10-10:50
Vladimr Filinov is a Doctor of Physics &Mathematical Science. He is a Professor at Moscow Power Engineering Institute. He received MSc degree in Physical Optics and also Mathematics from Moscow State University. His research interests are focusing on the correlation effects in strongly coupled quantum Coulomb systems.
For quantum simulations of thermodynamic and transport properties of the quark-gluon plasma (QGP) within a unified approach, we combine Path Integral and Wigner (phase space) formulations of quantum mechanics. Thermodynamic properties of a strongly coupled QGP of constituent quasi-particles are studied by means of color path integral Monte-Carlo simulations (CPIMC). For the purpose of simulations we have presented the QGP partition function in the form of a color path integral with a new relativistic measure instead of the usual Gaussian one used in Feynman and Wiener path integrals. For the integration over the color degree of freedom we have developed a sampling procedure according to the SU(3) Haar measure. It is shown that this method is able to reproduce the available Lattice Quantum Chromodynamics (LQCD) data describing the deconfined phase of QGP. Canonically averaged two-time quantum operator correlation functions and related kinetic coefficients have been calculated according to the quantum Kubo formulas. In this approach, CPIMC is used not only for the calculation of thermodynamic functions, but also to provide equilibrium initial conditions (i.e. specific coordinates, momenta, spin, flavor and color of quasi-particle configurations) in order to accomplish generation of the color-phase-space trajectories as solutions of related dynamic differential equations. Correlation functions and kinetic coefficients are calculated as averages of related Weyl's symbols of dynamic operators along these trajectories. Using this approach we have calculated the diffusion coefficient and the shear viscosity in a good agreement with experimental data.