Research Description
Our recent study considers the dynamics of classical and quantum models, in particular ring geometry: (a) with classical particles that perform random walk in disordered environment; (b) with quantum Bose particles whose dynamics is coherent.

In (a) it is possible to induce non-equilibrium steady state current, which requires e.g. a radiation source. One question that has been addressed concerns the relaxation of such current, and how it depends on percolation and localization properties of the model.

In (b) there is a possibility to have a super-current that does not decay even in the absence of an external driving source. This is known as super-fluidity. The study provides a theory for the meta-stability of such flow-states. A central observation is that the analysis should take into account the chaos that prevails in the classical limit of the model. It is the first time that the theory of "chaos" meets the theory of super-fluidity.

To read more on works related to (a) click hereTo read more on works related to (b) click here