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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-02946633] The role of the multiple excitation manifold in a driven quantum simulator of an antenna complex

 (24/09/2020)  
Biomolecular light-harvesting antennas operate as nanoscale devices in a regime where the coherent interactions of individual light, matter and vibrational quanta are non-perturbatively strong. The complex behaviour arising from this could, if fully understood, be exploited for myriad energy applications. However, non-perturbative dynamics are computationally challenging to simulate, and experiments on biomaterials explore very limited regions of the non-perturbative parameter space. So-called 'quantum simulators' of light-harvesting models could provide a solution to this problem, and here we employ the hierarchical equations of motion technique to investigate recent supercon-ducting experiments of Potočnik et al. (Nat. Com. 9, 904 (2018)) used to explore excitonic energy capture. By explicitly including the role of optical driving fields, non-perturbative dephasing noise and the full multi-excitation Hilbert space of a three-qubit quantum circuit, we predict the measure-able impact of these factors on transfer efficiency. By analysis of the eigenspectrum of the network, we uncover a structure of energy levels that allows the network to exploit optical 'dark' states and excited state absorption for energy transfer. We also confirm that time-resolvable coherent oscillations could be experimentally observed, even under strong, non-additive action of the driving and optical fields.

[hal-02935647] Effect of electrical conduction on the electron emission properties of diamond needles

 (11/09/2020)  

[hal-02935610] Capacitive effect in ultrafast laser-induced emission from low conductance diamond nanotips

 (11/09/2020)  

[hal-02916953] Computation and analysis of bound vibrational spectra of the Neon tetramer using row orthonormal hyperspherical coordinates.

 (11/09/2020)  

[hal-02915964] Threshold collision induced dissociation of pyrene cluster cations

 (09/09/2020)