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Quest for particles production in the plane gravitational wave spacetime

Year: 2025
Type: preprint
Abstract: Massless vector and scalar Green's functions are obtained in closed form for a plane gravitational wave spacetime using three independent methods: direct solution of the Green-function equation and construction via the DeWitt and Hadamard recursive schemes. The results coincide exactly with the DeWitt--Schwinger expansion, indicating no massless particles production in this background. Contrasting interpretations, based on Bogolyubov coefficient calculations predicting massless particle creation, are also addressed.
Language: English
Open Access status: green
OpenAlex ID: W7075994056
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