Temporally Asymmetric Fluctuations are Sufficient for the Operation of a Correlation Ratchet

摘要: A number of recent attempts to understand broad priniples energy transduction in biological systems have focused on correlation ratchets---systems which extract work out fluctuations are correlated time.[1, 2, 3, 4, 5, 6] Correlation ratchets ``information engines'' analogous Maxwell's Demon. a barh by using information about thte system ``choose'' only those helpful make the engine run.[7] This information, can be acquired if Demon is not equilibrium with bath,[8] used rectify already available, but otherwise inaccessible thermal bath. Processes like this, stored nonequilibrium bath transformed into woek at expense increased entropy, belived basis ``molecular motor,'' and great importance biology, other fields. I thas been shown that combination broken spatial symmetry potential (or ratchet potential) time correlations driving crucial, enough allow transformation work. The required implies specific molecular arrangement proteins involved. Here we show required, temporally asymmetric deiving mean zero do work, even when retchet completely symmetric. type temporal asymmetry particularly common bilogical systems.