RT Journal Article
T1 Stochastic thermodynamics of hidden pumps
A1 Esposito, Massimiliano
A1 Rodríguez Parrondo, Juan Manuel
AB We show that a reversible pumping mechanism operating between two states of a kinetic network can give rise to Poisson transitions between these two states. An external observer, for whom the pumping mechanism is not accessible, will observe a Markov chain satisfying local detailed balance with an emerging effective force induced by the hidden pump. Due to the reversibility of the pump, the actual entropy production turns out to be lower than the coarse-grained entropy production estimated from the flows and affinities of the resulting Markov chain. Moreover, in presence of a large time scale separation between the fast-pumping dynamics and the slow-network dynamics, a finite current with zero dissipation may be produced. We make use of these general results to build a synthetase-like kinetic scheme able to reversibly produce high free-energy molecules at a finite rate and a rotatory motor achieving 100% efficiency at finite speed.
PB American Physical Society
SN 1539-3755
YR 2015
FD 2015-05-11
LK https://hdl.handle.net/20.500.14352/24127
UL https://hdl.handle.net/20.500.14352/24127
LA eng
NO © 2015 American Physical Society.M.E. is supported by the National Research Fund, Luxembourg in the frame of project FNR/A11/02. J.M.R.P. acknowledges financial support from Grant ENFASIS (No. FIS2011-22644, Spanish Government). This work also benefited from the COST Action Grant No. MP1209.
NO National Research Fund, Luxemburgo
NO Gobierno de España
NO European Cooperation in Science and Technology (COST)
DS Docta Complutense
RD 11 abr 2025