Presentation

The LCAR (Laboratoire Collisions-Agrégats-Réactivité) is a laboratory centered in fundamental physics organized around two main fields

  1. The study of laser-matter interaction focuses on matter waves studies and strong-field physics
  2. The study of molecular structures and dynamics develops the study and measurement of the properties of clusters, molecules of biological interest, and nano-objects in their environment

Research teams in the lab

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[hal-01685236] Electronic field emission models beyond the Fowler-Nordheim one  (12/11/2019)  
We propose several quantum mechanical models to describe electronic field emission from first principles. These models allow to correlate quantitatively the electronic emission current to the electrode surface details at the atomic scale. They all rely on electronic potential energie surfaces obtained from three dimensional density functional theory calculations. They differ by the various quantum mechanical methods (exact or perturbative, time dependent or time independent) which are used to describe tunneling through the electronic potential energy barrier. Comparison of these models between them and with the standard Fowler-Nordheim one in the context of one dimensional tunneling allows to assess the impact on the accuracy of the computed current of the approximations made in each model. Among these methods, the time dependent perturbative one provides a well balanced trade-off between accuracy and computational cost.

[hal-02349768] A three dimensional numerical quantum mechanical model of field electron emission from metallic surfaces covered with carbon adsorbates  (08/11/2019)  
[tel-02333474] Trajectory-based methods for the study of ultrafast quantum dynamics  (31/10/2019)  
[tel-02325381] Vers la stabilisation d'un interféromètre atomique contre les vibrations : le pendule à lame élastique et son amortissement  (31/10/2019)  
[tel-02301575] Dynamique quantique ultra-rapide de nanogouttes d'hélium superfluide dopées  (31/10/2019)