Geometrically-protected reversibility in hydrodynamic Loschmidt-echo experiments
Abstract
We demonstrate an archetypal Loschmidt-echo experiment involving thousands of droplets which interact in a reversible fashion via a viscous fluid. Firstly, we show that, unlike equilibrium systems, periodically driven microfluidic emulsions self-organize and geometrically protect their macroscopic reversibility. Self-organization is not merely dynamical; we show that it has a clear structural signature akin to that found in a mixture of molecular liquids. Secondly, we show that, above a maximal shaking amplitude, structural order and reversibility are lost simultaneously in the form of a first order non-equilibrium phase transition. We account for this discontinuous transition in terms of a memory-loss process. Finally, we suggest potential applications of microfluidic echo as a robust tool to tailor colloidal self-assembly at large scales.
Cite
@article{arxiv.1407.1696,
title = {Geometrically-protected reversibility in hydrodynamic Loschmidt-echo experiments},
author = {Raphaël Jeanneret and Denis Bartolo},
journal= {arXiv preprint arXiv:1407.1696},
year = {2014}
}