Negative radiation pressure in case of two interacting fields

TL;DR

This paper explores a simple classical field theory model with two interacting scalar fields to illustrate the phenomenon of negative radiation pressure and its dependence on the mass ratio of the fields.

Contribution

It introduces a pedagogical toy model of two interacting scalar fields to explain negative radiation pressure and provides insights into radiation-vortex interactions.

Findings

Negative radiation pressure can occur depending on the mass ratio of the fields.

The model demonstrates how interaction between fields influences radiation pressure.

Insights gained may help understand radiation interactions in more complex systems.

Abstract

We study a simple toy model, which although probably does not have any direct physical applications, can serve as a nice pedagogical example for explanation strange phenomenon of negative radiation pressure and can also give some insight for understanding the interaction between radiation and a vortex. The model discussed is a classical field theory of two interacting scalar fields in 1+1 d. Without coupling one of the fields is governed by the ordinary $\phi^4$ equation and the second one obeys the Klein-Gordon equation. The possibility of existence of the {\it negative radiation pressure} with a respect to the mass ratio of those two fields is discussed.