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Theory days on Fast and Ultrafast electronic processes in clusters and molecules

Toulouse, Nov 27-29 2019

par Mai Seve-Dinh - 28 juillet 2019

Organizers : M. Belkacem, P. M. Dinh, C. Meier, and E. Suraud

Location : IRSAMC building, room 20, ground floor

Aim and objectives

Following the tradition of the previous successful meetings that have started in 2009, the Theory Days workshop aims at stimulating constructive discussions, collaborations, and knowledge exchange among a selected group of theoreticians. This year, the eleventh edition will be dedicated to methods and numerical treatments of fast and ultrafast electronic processes in clusters and molecules, following laser irradiation or collisions with charged projectiles. Recent developments in laser technology now allow to generate pulses in the attosecond domain which in principle should open the door to fully time resolved analysis of the electronic response of the system to such perturbations. Comparable time scales are attained in the case of collisions with charged projectiles, which also open interesting questions in terms of applications, in particular for the physics of irradiation, in a biological context or in electronic circuits.

Such fast or ultra fast processes thus possibly open the door to a bunch of new phenomena which deserve dedicated analysis, both from the experimental and theoretical sides. We shall focus the discussions of this workshop on how to access, from a theoretical viewpoint, potentially relevant quantities to be measured within such fast processes. These “ultrafast” cases represent ultimately fast processes but key questions also show up in longer, although still very fast, processes such as the ones attained following few cycle IR laser irradiations. Recent investigations have for example shown the importance of the Carrier Envelop Phase, namely the relative phase between laser envelop and oscillatory pattern. Such longer (fast but not ultrafast) processes will also be addressed during this workshop. We shall, as usual during the Theory Days, focus on theoretical aspects and try to see how much can be attained with current theoretical tools, as well as how much need to be developed to better address these phenomena. Among pending questions we shall for example discuss the potential impact of correlations during such fast and ultrafast processes.

We plan to gather people from various groups working in this domain, mostly in western Europe. The meeting is intended to be a working forum, thus rather informal. The format will consist in a series of long detailed talks, typically 1 hour (40 min talk + 15 min for questions) focusing in particular on ongoing problems and open ends. We thus urge participants to prepare their talks in this spirit. Ultimately, a most efficient organization would consist in having a limited number of talks per representative group in order to avoid doubling. If a consensus is reached during the workshop, it would be highly profitable to possibly establish, at best collaborative links between the various groups with possible exchange of researchers and students, at worst an ongoing follow-up of progress in the field.

Scientific program

The list of speakers can be found below.

  • H. Abdoul-Carime, L2I, Lyon, France
  • C. Arnold, DESY, Hambourg, Germany
  • F. Catoire, CELIA, Bordeaux, France
  • C. Champion, CENBG, Bordeaux, France
  • D. Dundas, Dept of Physics and Astronomy, Queen’s University of Belfast, UK
  • F. Lackner, Institute for Theoretical Physics, Vienna University of Technology, Austria
  • F. Lépine, ILM, Lyon, France
  • E. Lindroth, Dept of Physics, Stockholm university, Sweden
  • A. Picon, Chemistry Dept, Universidad Autonoma de Madrid, Spain
  • B. Pons, CELIA, Bordeaux, France
  • P.-G. Reinhard, Institute for Theoretical Physics, Univ. Erlangen, Germany
  • L. Seiffert, Univ. Rostock, Germany

Wed Nov 27th 2019

14:00 H. Abdoul-Carime L2I Lyon, France Interaction of Low Energy (<10eV) Electrons with Molecules (and Molecular Clusters)
15:00 F. Lépine ILM, Lyon, France probing ultrafast energy and charge dynamics in large polyatomic systems following XUV excitation
16:00 C. Arnold DESY, Hamburg, Germany Ultrafast molecular dynamics following photoionisation : Interplay of electron and nuclear motion

Thu Nov 28th 2019

09:00 E. Lindroth Dept of Physics, Stockholm university, Sweden Attosecond Delays in Photoionization
10:00 F. Lackner Technishe Universität Wien, Vienna, Austria Time-Dependent Two-Particle Reduced Density Matrix Method
11:00 F. Catoire CELIA, Bordeaux, France Spatial and temporal properties of high-order harmonics : from macroscopic aspects to solid state generation
14:15 P.-G. Reinhard Institute for Theoretical Physics, Univ. Erlangen, Germany Information content of atto pulse experiments — a theoretical exploration
15:15 L. Seiffert Univ. Rostock, Germany Impact of electron transport on attosecond streaking in dielectrics
16:15 B. Pons CELIA, Bordeaux, France Molecular spectroscopy by attosecond electron wavepackets

Fri Nov 29th 2019

09:00 C. Champion CELIA, Bordeaux, France Dosimetry of ionizing radiations in biological tissues : Importance of calculations at a microscopic scale
10:00 D. Dundas Dept of Physics and Astronomy, Queen’s University of Belfast, UK Probing non-adiabatic dynamics in radiosensitisers
11:00 A. Picon Chemistry Dept, Universidad Autonoma de Madrid, Spain Ultrafast x-ray spectroscopy for electron and fast nuclear dynamics

Practical aspects

Access to Toulouse


Toulouse airport is connected to major west European airports and hubs (Paris Orly and Roissy Charles de Gaulle, Munich, Frankfurt, London, Amsterdam) with regular connections by Air France/KLM, Lufthansa, British Airways for the major companies and also with connections by (Low Cost) Easy Jet. Plane provides by far the simplest access to Toulouse with reasonable fees for sufficiently early booking.

There is a shuttle to downtown (first stop at Compans Caffarelli, on line B of metro) every 20 mn (cost is 8 euros for a one-way combined shuttle/metro ticket, no special fare for a return trip). As soon as one catches the shuttle, it takes about half an hour to get to the University, thanks to the connection with line B at Compans Caffarelli station (direction "Ramonville-Saint-Agne", get off at station Université Paul Sabatier).

You can also take the tramway line T2, get off at Palais de Justice, change to metro line B towards Ramonville-Saint-Agne and get off at Université Paul Sabatier. This will cost you a metro ticket (1.70 euro) and takes approximately 45 minutes.


Central station is Toulouse Matabiau connected to line A of the metro and is connected to major French cities. To go to the university, take metro line A towards Basso Cambo, get off at Jean Jaurès (1 stop from Marengo-SNCF station), change to metro line B towards Ramonville-Saint-Agne and get off at Université Paul Sabatier. It takes about 20-25 minutes.

Directions to the meeting venue

The meeting will take place in room 20, ground floor of the institute building (there is a big sign "IRSAMC" at the main entrance of the building).

To reach the IRSAMC building, follow the instructions below :

  • Take metro line B, direction Ramonville Saint-Agne
  • Get off at "Universite Paul Sabatier"
  • Exit towards the university
  • Follow the indications of the map below.

Suggestions of hotels

Here is a list of hotels downtown.