Extreme reductions of entropy in an electronic double dot
Abstract
We experimentally study negative fluctuations of stochastic entropy production in an electronic double dot operating in nonequilibrium steadystate conditions. We record millions of random electron tunneling events at different bias points, thus collecting extensive statistics. We show that for all bias voltages, the experimental average values of the minima of stochastic entropy production lie above k_{B} , where k_{B} is the Boltzmann constant, in agreement with recent theoretical predictions for nonequilibrium steady states. Furthermore, we also demonstrate that the experimental cumulative distribution of the entropy production minima is bounded, at all times and for all bias voltages, by a universal expression predicted by the theory. We also extend our theory by deriving a general bound for the average value of the maximum heat absorbed by a mesoscopic system from the environment and compare this result with experimental data. Finally, we show by numerical simulations that these results are not necessarily valid under nonstationary conditions.
 Publication:

Physical Review B
 Pub Date:
 March 2019
 DOI:
 10.1103/PhysRevB.99.115422
 arXiv:
 arXiv:1712.01693
 Bibcode:
 2019PhRvB..99k5422S
 Keywords:

 Condensed Matter  Statistical Mechanics;
 Condensed Matter  Mesoscale and Nanoscale Physics
 EPrint:
 16 pages, 12 figures