Axion-like particle production in a laser-induced dynamical spacetime

TL;DR

This paper models electron oscillations in a laser field as a dynamical spacetime, deriving axion-like particle production rates via quantum field theory in curved spacetime, suggesting a new experimental approach for axion detection.

Contribution

It introduces a novel framework linking laser-induced electron dynamics to a curved spacetime analogy, enabling axion-like particle production calculations.

Findings

Derives particle-antiparticle pair production rate in a dynamical spacetime

Shows the analogy between laser-induced electron motion and cosmological metrics

Proposes an alternative experimental method for axion searches

Abstract

We consider the dynamics of a charged particle (e.g., an electron) oscillating in a laser field in flat spacetime and describe it in terms of the variable mass metric. By applying Einstein's equivalence principle, we show that, after representing the electron motion in a time-dependent manner, the variable mass metric takes the form of the Friedmann-Lema\^itre-Robertson-Walker metric. We quantize a massive complex scalar or pseudo-scalar field in this spacetime and derive the production rate of electrically neutral, spinless particle-antiparticle pairs. We show that this approach can provide an alternative experimental method to axion searches.