Dynamique des gaz quantiques (particules discernables sans spin)

Dynamique des gaz quantiques (particules discernables sans spin)

Nous appliquons les résultats de deux articles précédents, en particulier uné equation cinétique généralisant l'´ equation de Boltzmann, ` a l'´ etude des gaz dilués quantiques hors d'´ equilibre. Par une simple extension de la méthode de Chapman Enskog appliquéè a cetté equation cinétique, nous calculons les propriétés hydrodynamiques du gaz. A l'ordre le plus bas (hydrodynamique d'Euler), nou...

Manipulation des Interactions dans les Gaz Quantiques:

The interparticle interactions in ultracold atomic gases can be tuned using Fano–Feshbach scattering resonances, which occur in low–energy collisions between two atoms. These resonances are usually obtained using an external static magnetic field. They turn ultracold atomic gases into an experimental playground for the investigation of novel phases in which Quantum Physics plays a key role. The...

Gestion dynamique des topologies sans fils

Caractérisation pratique des systèmes quantiques

Known strategies for sending bits at the capacity rate over a general channel with classical input and quantum output (a cq channel) require the decoder to implement impractically complicated collective measurements. Here, we show that a fully collective strategy is not necessary in order to recover all of the information bits. In fact, when coding for a large number N uses of a cq channel W , ...

Intégration de périphériques contraints par reconfiguration dynamique d'applications. Cas des capteurs sans-fil

The recent emergence of mobile wireless sensors able to give information on their physical environment and to process data, should enable to provide applications aware of their physical context and to evolve according to its changes. This requires to be able to design applications that integrate both software and hardware components, able to communicate and to use available contextual informati...