Abstract
Among the most interesting recent developments in the theory of nonequilibrium processes are so-called fluctuation theorems. These theorems make quantitative statements on the probability of negative entropy production in nonequilibrium systems. I will start with fluctuation theorems and its connections to large deviations. I will then describe how the large deviation function can be evaluated for the heat flow across a harmonic chain. Finally, I will show application of the results to an recent experiment.
