Universal Casimir interaction between two dielectric spheres in salted water

Abstract

We study the Casimir interaction between two dielectric spheres immersed in a salted solution at distances larger than the Debye screening length. The long distance behavior is dominated by the non-screened interaction due to low-frequency transverse magnetic thermal fluctuations. It shows universality properties in its dependence on geometric dimensions and independence of dielectric functions of the particles, with these properties related to approximate conformal invariance.

5 pages, 4 figures

References in corpus (5)

• The Casimir effect within scattering theory
• Classical Casimir interaction in the plane-sphere geometry
• Probing the screening of the Casimir interaction with optical tweezers
• Plane-wave approach to the exact van der Waals interaction between colloid particles
• Classical Casimir free energy for two Drude spheres of arbitrary radii: A plane-wave approach