## 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

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## Last submission

[hal-02481944] Spontaneous emission and energy shifts of a Rydberg rubidium atom close to an optical nanofiber  (20/05/2020)   Moins
In this paper, we report on numerical calculations of the spontaneous emission rates and Lamb shifts of a $^{87}\text{Rb}$ atom in a Rydberg-excited state $\left(n\leq30\right)$ located close to a silica optical nanofiber. We investigate how these quantities depend on the fiber's radius, the distance of the atom to the fiber, the direction of the atomic angular momentum polarization as well as the different atomic quantum numbers. We also study the contribution of quadrupolar transitions, which may be substantial for highly polarizable Rydberg states. Our calculations are performed in the macroscopic quantum electrodynamics formalism, based on the dyadic Green's function method. This allows us to take dispersive and absorptive characteristics of silica into account; this is of major importance since Rydberg atoms emit along many different transitions whose frequencies cover a wide range of the electromagnetic spectrum. Our work is an important initial step towards building a Rydberg atom-nanofiber interface for quantum optics and quantum information purposes.

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[ensl-02570537] Engineered Swift Equilibration of brownian particles: consequences of hydrodynamic coupling  (15/05/2020)   Plus
[hal-02567526] Alkali atoms attached to vortex-hosting Helium nanodroplets  (16/05/2020)   Plus
[hal-02535447] Finite-time adiabatic processes: Derivation and speed limit  (08/04/2020)   Plus