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DY: Fachverband Dynamik und Statistische Physik
DY 6: Statistical Physics far from Thermal Equilibrium I
DY 6.7: Vortrag
Montag, 18. März 2024, 11:30–11:45, BH-N 334
Thermal relaxation asymmetry in reversible and driven systems — •Cai Dieball1, Miguel Ibáñez2, Gerrit Wellecke1,3, Antonio Lasanta2, Raúl A Rica2, and Aljaz Godec1 — 1Max Planck Institute for Multidisciplinary Sciences, Göttingen — 2Universidad de Granada, Spain — 3Present address: Max Planck Institute for Dynamics and Self-Organization, Göttingen
It was theoretically predicted that small systems subject to temperature changes that push the system far from thermodynamic equilibrium feature an asymmetric thermal relaxation. More precisely, heating was predicted to be faster than cooling [1]. Here, by using an optically trapped colloidal particle, we confirm this prediction [2]. Developing a new theoretical framework that we call thermal kinematics, we quantify relaxation between arbitrary pairs of temperatures.
To complete the non-equilibrium picture of thermal relaxation, we also prove the relaxation asymmetry for systems inherently driven out of equilibrium [3]. The resulting relaxation highlights the absence of local equilibria and surprisingly features opposing rotational motions during heating and cooling.
References:
[1] Lapolla & Godec, Phys. Rev. Lett. 125, 110602 (2020)
[2] Ibáñez, Dieball, Lasanta, Godec & Rica, accepted in Nat. Phys. (2023)
[3] Dieball, Wellecke & Godec, accepted in Phys. Rev. Research (2023)
Keywords: Thermal relaxation; Stochastic thermodynamics; Langevin dynamics; Colloidal particle; Optical tweezers