Efficiency of stochastic machines

One of my main research lines is to study the role of noise on the performance of thermodynamic machines working far from equilibrium. Contrary to intuition, noise and friction are crucial ingredients to obtain efficient machines. On this line of research, I have studied what is the behavior of the efficiency treated as a stochastic variable

MP, G. Verley and M. Esposito, Efficiency Statistics at All Times: Carnot Limit at Finite Power, Phys. Rev. Lett. 114, 050601 (2015)

and I tried to argue that powerful efficient machines are not theoretically excluded:

MP and M. Esposito, Carnot efficiency at divergent power output, arXiv:1611.08192 [paper description]

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