Optimal superconducting hybrid machine

Optimal engine performances can be accomplished by quantum effects. Here we explore two routes toward ideal engines, namely (1) systems that operate as hybrid machines being able to perform more than one useful task and (2) the suppression of fluctuations in doing such tasks. For classical devices, absence is conditioned a high entropy production, dictates thermodynamic uncertainty relations. generalize relations for multiterminal conductors thermal machines. These are overcome show double dot contacted normal metals reservoir generator entangled Cooper pairs.