Single-file diffusion in a bi-stable potential: Signatures of memory in the barrier-crossing of a tagged-particle.
Single-file diffusion in a bi-stable potential: Signatures of memory in the barrier-crossing of a tagged-particle.
复制标题
双稳态势中的单列扩散:标记粒子跨越障碍时的记忆特征。
DOI:
10.1063/5.0025785
复制
发表时间:
2020
期刊:
影响因子:
--
通讯作者:
A. Godec
中科院分区:
文献类型:
--
作者:
Alessio Lapolla;A. Godec
We investigate memory effects in barrier-crossing in the overdamped setting. We focus on the scenario where the hidden degrees of freedom relax on exactly the same time scale as the observable. As a prototypical model, we analyze tagged-particle diffusion in a single file confined to a bi-stable potential. We identify the signatures of memory and explain their origin. The emerging memory is a result of the projection of collective many-body eigenmodes onto the motion of a tagged-particle. We are interested in the "confining" (all background particles in front of the tagged-particle) and "pushing" (all background particles behind the tagged-particle) scenarios for which we find non-trivial and qualitatively different relaxation behaviors. Notably and somewhat unexpectedly, at a fixed particle number, we find that the higher the barrier, the stronger the memory effects are. The fact that the external potential alters the memory is important more generally and should be taken into account in applications of generalized Langevin equations. Our results can readily be tested experimentally and may be relevant for understanding transport in biological ion-channels.
影响因子:
13.6
作者:
Thorneywork, Alice L.;Gladrow, Jannes;Qing, Yujia;Rico-Pasto, Marc;Ritort, Felix;Bayley, Hagan;Kolomeisky, Anatoly B.;Keyser, Ulrich F.
通讯作者:
Keyser, Ulrich F.
DOI:
10.1073/pnas.1816909116
发表时间:
2019-04-02
影响因子:
11.1
作者:
Rico, Felix;Russek, Andreas;Scheuring, Simon
通讯作者:
Scheuring, Simon
影响因子:
6.8
作者:
Chung HS;Eaton WA
通讯作者:
Eaton WA