Tal-Friedman Ofir, Pal Arnab, Sekhon Amandeep, Reuveni Shlomi, Roichman Yael
School of Physics & Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 6997801, Israel.
School of Chemistry, The Center for Physics and Chemistry of Living Systems, & The Mark Ratner Institute for Single Molecule Chemistry, Tel Aviv University, Tel Aviv 6997801, Israel.
J Phys Chem Lett. 2020 Sep 3;11(17):7350-7355. doi: 10.1021/acs.jpclett.0c02122. Epub 2020 Aug 24.
Stochastic resetting is prevalent in natural and man-made systems, giving rise to a long series of nonequilibrium phenomena. Diffusion with stochastic resetting serves as a paradigmatic model to study these phenomena, but the lack of a well-controlled platform by which this process can be studied experimentally has been a major impediment to research in the field. Here, we report the experimental realization of colloidal particle diffusion and resetting via holographic optical tweezers. We provide the first experimental corroboration of central theoretical results and go on to measure the energetic cost of resetting in steady-state and first-passage scenarios. In both cases, we show that this cost cannot be made arbitrarily small because of fundamental constraints on realistic resetting protocols. The methods developed herein open the door to future experimental study of resetting phenomena beyond diffusion.
随机重置在自然和人造系统中普遍存在，引发了一系列非平衡现象。具有随机重置的扩散是研究这些现象的典型模型，但缺乏一个可以通过实验研究该过程的良好控制平台一直是该领域研究的主要障碍。在此，我们报告了通过全息光镊实现胶体粒子扩散和重置的实验。我们首次对核心理论结果进行了实验验证，并继续测量稳态和首次通过情况下重置的能量成本。在这两种情况下，我们都表明，由于对现实重置协议的基本限制，这种成本不能被任意降低。本文开发的方法为未来超越扩散的重置现象实验研究打开了大门。
