**Abstract: **
The last fifteen years have witnessed dramatic developments in the
theory of far from equilibrium statistical physics. The aim of the
lectures is to provide a simple introduction to two main results: a
generalization of the second law of thermodynamics to small systems
(fluctuation theorem) and a nonequilibrium equality for free energy
differences (Jarzynski equality). The lectures will be based on the
intuitive formalism of the Langevin equation and make extensive
contact with recent experiments.

Program of the minicourse:

- Langevin equation (I)
- Langevin equation (II)
- Linear response and Onsager relations (I)
- Linear response and Onsager relations (II)
- Fluctuation theorem (I)
- Fluctuation theorem (II)
- Jarzynski equality (I)
- Jarzynski equality (II)