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.