Anomalous heating in a colloidal system - Archive ouverte HAL
Pré-Publication, Document De Travail Année : 2021

Anomalous heating in a colloidal system

Raphaël Chétrite
Avinash Kumar
  • Fonction : Auteur
John Bechhoefer

Résumé

We report anomalous heating in a colloidal system, the first observation of the inverse Mpemba effect, where an initially cold system heats up faster than an identical warm system coupled to the same thermal bath. For an overdamped, Brownian colloidal particle moving in a tilted double-well potential, we find a non-monotonic dependence of the heating times on the initial temperature of the system, as predicted by an eigenfunction expansion of the associated Fokker-Planck equation. By carefully tuning parameters, we also observe a "strong" version of anomalous heating, where a cold system heats up exponentially faster than systems prepared under slightly different conditions

Dates et versions

hal-03365443 , version 1 (05-10-2021)

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Raphaël Chétrite, Avinash Kumar, John Bechhoefer. Anomalous heating in a colloidal system. 2021. ⟨hal-03365443⟩
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