Diffusive Transport and Entropy Production in Colloidal Systems
Pik-Yin Lai1*, Penger Tong2
1Physics, National Central University, TaoYuan City, Taiwan
2Physics, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
* Presenter:Pik-Yin Lai, email:pylai@phy.ncu.edu.tw
The equilibrium and non-equilibrium thermodynamics associated with the stochastic trajectories of a probe colloidal particle over a two-dimensional potential is examined both theoretically and experimentally. Equilibrium Diffusive transport on a single particle and population distribution level are investigated over periodic, random and quasi-periodic potentials. Entropy production in non-equilibrium steady-states(NESS) obtained by a tilted periodic potential are calculated and verified in experiments, detailed balanced are observed to be violated to different extend as the system is driven further away from equilibrium. Non-Boltzmann steady-state distribution is derived for this NESS state and verified in experiments.

Keywords: Non-equilibrium statistical physics, Colloidal transports, Entropy Production