Axion particle production in a laser-induced dynamical spacetime

Wadud, M.A. and King, B. and Bingham, R. and Gregori, G. (2018) Axion particle production in a laser-induced dynamical spacetime. Physics Letters B, 777. pp. 388-393. ISSN 0370-2693 (

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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–Lemaître–Robertson–Walker metric. We quantize a pseudo-scalar field in this spacetime and derive the production rate of electrically neutral, spinless particles. We show that this approach can provide an alternative experimental method to axion searches.


Wadud, M.A., King, B., Bingham, R. ORCID logoORCID: and Gregori, G.;