Long-range fluctuation-induced forces in driven electrolytes

Abstract

We study the stochastic dynamics of an electrolyte driven by a uniform external electric field and show that it exhibits generic scale invariance despite the presence of Debye screening. The resulting long-range correlations give rise to a Casimir-like fluctuation-induced force between neutral boundaries that confine the ions; this force is controlled by the external electric field, and it can be both attractive and repulsive with similar boundary conditions, unlike other long-range fluctuation-induced forces. This work highlights the importance of nonequilibrium correlations in electrolytes and shows how they can be used to tune interactions between uncharged biological or synthetic structures at large separations.

To appear in Phys Rev Lett

References in corpus (6)

• Scaling analysis of the screening length in concentrated electrolytes
• The Casimir effect: from quantum to critical fluctuations
• Are Room Temperature Ionic Liquids Dilute Electrolytes?
• Critical Casimir effect for colloids close to chemically patterned substrates
• Universal Long Ranged Correlations in Driven Binary Mixtures
• Transient Casimir forces from quenches in thermal and active matter