Second law, entropy production, and reversibility in thermodynamics of information

We present a pedagogical review of the fundamental concepts in thermodynamics of information, by focusing on the second law of thermodynamics and the entropy production. Especially, we discuss the relationship among thermodynamic reversibility, logical reversibility, and heat emission in the context of the Landauer principle and clarify that these three concepts are fundamentally distinct to each other. We also discuss thermodynamics of measurement and feedback control by Maxwell's demon. We clarify that the demon and the second law are indeed consistent in the measurement and the feedback processes individually, by including the mutual information to the entropy production.Comment: 43 pages, 10 figures. As a chapter of: G. Snider et al. (eds.), "Energy Limits in Computation: A Review of Landauer's Principle, Theory and Experiments

Accessible volume in quenched-annealed mixtures of hard spheres: a geometric decomposition

International audienceModel systems in which fluid particles move in a disordered matrix of immobile obstacles have been found to be a reasonable representation of a colloidal fluid confined in a disordered porous medium. For systems consisting of hard-sphere particles, the obstacle matrix partitions the space available to the fluid particles into voids of finite volume ("traps") and a percolating void that extends over the entire volume. This geometric distinction plays a key role for the dynamic properties of the confined fluid: while its particles are not able to escape from traps, in the percolating void they can propagate infinitely far. We present a geometric method, based on a Delaunay decomposition, to identify the two different kinds of voids in an arbitrary matrix configuration of finite size under periodic boundary conditions. We subsequently apply a rastering technique, which enables us to statistically characterize the structure of the voids. We investigate the specific case of a quenched-annealed mixture of identical hard spheres, for which, among others, we accurately determine the matrix packing fraction at which the percolation transition of the voids takes place

A simple theoretical model for the hydrogen electrosorption on platinum in acid medium

L’équilibre de coadsorption de l’hydrogène et des anions sur des surfaces de platine en milieu acide est décrit dans l’approximation du champ moyen à l’aide du modèle du gaz sur réseau à trois états où ne sont prises en compte que les interactions à deux corps entre proches voisins. Les voltammogrammes expérimentaux de Pt(100) dans H2SO4 et dans HClO4 sont d’abord analyses en terme de pics d’adsorption distincts et indépendants don t il est rendu compte à l’aide de l’isotherme de Frumkin-Fowler. Chaque pic peut être ensuite étudié à l’aide du modèle de coadsorption. Ceci permet de montrer que la compétition d’adsorption entre l’hydrogène et les anions spécifiquement adsorbés peut rendre compte du rétrécissement et du déplacement du pic correspondant à l’état d’adsorption de l’hydrogène le plus lié

PREWETTING AT A LIQUID-MIXTURE SOLID INTERFACE - A COMPARISON OF MONTE-CARLO SIMULATIONS WITH MEAN-FIELD DENSITY-FUNCTIONAL THEORY

10947-1095

Phase diagrams of single-component fluids in disordered porous materials: Predictions from integral-equation theory

264-27

THE PRESSURE OF A FLUID CONFINED IN A DISORDERED POROUS MATERIAL

4256-426

Phase diagrams of single-component fluids in disordered porous materials: Predictions from integral-equation theory (vol 106, pg 264, 1997)

689-69

Phase diagrams of single-component fluids in disordered porous materials: Predictions from integral-equation theory

264-27