Casimir expulsion of shifted configurations

TL;DR

This paper demonstrates that shifting nanosized metal structures can induce Casimir forces that cause expulsion or restoring forces, leading to potential applications in nanoscale actuation and oscillation control.

Contribution

It introduces the concept of Casimir expulsion in shifted configurations and analyzes the resulting forces and dynamic behaviors in such systems.

Findings

Shifted configurations exhibit maximal Casimir forces at specific geometries.

Forces tend to restore shifted structures to their original positions.

Systems can display torsion moments and complex oscillations.

Abstract

The shift of nanosized metal configurations relative to one another can lead to an increase in the range of optimal lengths of wings and angles of the opening of cavities, at which noncompensated Casimir forces in them are maximal. The possibility of the existence of the effect of Casimir expulsion is demonstrated with a trapezoid cavity with shifted wings which are opened at different angles. It is also shown that shift in parallel structures leads to the appearance of forces tending to bring the configuration back to the situation before the shift. In some conditions, in systems with shifted structures there are moments of torsion and complex oscillation processes.