# Long Distance Signaling Using Axion-like Particles

## TL;DR

This paper explores the potential of axion-like particles for enabling long-distance communication, deriving equations and providing calculations that suggest feasibility over hundreds of kilometers under certain particle parameter conditions.

## Contribution

It introduces a framework for long-distance signaling using axion-like particles, including antenna concepts and a Friis-like equation for link calculations.

## Key findings

- Communication over 1000 km may be possible for specific axion mass and coupling constants.
- Derived a Friis-like equation tailored for axion-based communication links.
- Provided an example calculation demonstrating potential feasibility.

## Abstract

The possible existence of axion-like particles could lead to a new type of long distance communication. In this work, basic antenna concepts are defined and a Friis-like equation is derived to facilitate long-distance link calculations. An example calculation is presented showing that communication over distances of 1000 km or more may be possible for $m_{a}< 3.5$ meV and $g_{a\gamma \gamma} > 5 \times 10^{- 8} {\text{GeV}}^{- 1}$.

---
Source: https://tomesphere.com/paper/0704.0490