Speaker: Dr Pierfrancesco Di Cintio
Institute of Applied Physics of the National Council of Research (IFAC-CNR)
Title: Chaos, noise, discreteness effects and the continuum limit in N-body systems, revisited
Date and time: Monday 2 October 2017, 3:30–4:30pm – note unusual day and time
Location: Building 8 Level 9 Room 66 (AGR) RMIT City campus
Abstract: In this talk I will question the validity of the continuum limit and the use of frozen N-body realizations to obtain qualitative information on particle orbits in large N gravitational system in stellar dynamics. With the aid of detailed numerical simulations with refined symplectic integrators developed in the context of numerical celestial mechanics, I will compare orbits in frozen potentials with orbits in self consistent equilibrium models. In addition, I will show some results that could be relevant for the physics of charged particle beams.
Bio: Pierfrancesco Di Cintio is a postdoctoral researcher at the institute of Applied Physics of the National Council of Research (IFAC-CNR) since august 2016. His current research activity focuses on the development of efficient numerical integrators for orbit propagation for the long term analysis of populations of space debris in low to medium Earth orbit.
Pierfrancesco graduated in theoretical Astrophysics in 2009 at the university of Bologna with a thesis on dissipationless collapse with modified gravities. From 2010 to 2014 he was PhD student in the international Max Planck research school (IMPRS) at the Technical university of Dresden and the Max Planck institute for the Physics of Complex systems. He obtained his Phd degree in 2014 with a thesis on the dynamics of laser generated plasmas in nano clusters. After a short period in the UK as a visitor at the London Mathematical Laboratory, Pierfrancesco was postdoctoral researcher at the university of Florence from november 2014 to july 2016, working on numerical methods to study the collisional transport in plasmas. Since 2015 Pierfrancesco is also external fellow of the National Institute of Nuclear Physics (INFN).
At the moment, his main research interests range from the chaotic dynamics of many-body problems to the statistical treatment of perturbations on orbits in gravitational systems and plasmas.