Casimir force of expulsion

TL;DR

This paper demonstrates that noncompensated Casimir forces can exist in nanoscale open metal cavities, leading to a time-dependent expulsion effect, with optimal cavity configurations identified for maximum force.

Contribution

It introduces a theoretical model for noncompensated Casimir forces in open cavities and determines optimal geometrical parameters for maximal expulsive force.

Findings

Noncompensated Casimir force can cause cavity expulsion.

Optimal cavity angles and dimensions maximize the force.

The theory applies to trapezoid and parallel mirror configurations.

Abstract

The possibility in principle is shown that the noncompensated Casimir force can exist in nanosized open metal cavities. The force shows up as time-constant expulsion of open cavities toward their least opening. The optimal parameters of the angles of the opening, of "generating lines" of cavities and their lengths are found at which the expulsive force is maximal. The theory is created for trapezoid configurations, in particular for parallel mirrors which experience both the transverse Casimir pressure and longitudinal compression at zero general expulsive force.