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Accueil du site > Seminars > Séminaires théorie > Theory Club Vendredi 6 Mars 2015 à 12h30 en salle 646A. Daniel Hexner: " Unusual Fluctuations in Absorbing State Models".

Theory Club Vendredi 6 Mars 2015 à 12h30 en salle 646A. Daniel Hexner: " Unusual Fluctuations in Absorbing State Models"

Unless otherwise stated, seminars and defences take place at 11:30 in room 454A of Condorcet building.


Unusual Fluctuations in Absorbing State Models

Daniel Hexner

Abstract: Systems with short-range interactions show sqrt(N) fluctuations in equilibrium, except near a critical point, where the fluctuations diverge, with different scaling. We study a class of non-equilibrium systems with a continuous phase transition separating an “absorbing” phase (where the dynamics ultimately ceases) from an “active” phase (where diffusive-like dynamics persists forever). Remarkably even though the interactions are finite ranged, the dynamics lead to a “hyperuniform” state with diminished density fluctuations at the critical point. This prediction can be tested experimentally using a system of sheared colloids. In addition, we derive a scaling relation that relates the anomalous density fluctuations to other known exponents and study the effect of infinitesimal diffusion.

Vendredi 6 Mars à 12h30 en salle 646A


Contact : Équipe séminaires / Seminar team - Published on / Publié le 23 February 2015


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