| Abstract: |
| In this talk, we present, in explicit form, the spherical waves in the FLRW universe with a scale factor generated by de~Sitter space.
As an application of these explicitly written solutions of the Klein-Gordon and Dirac equations, we test the decay in time of the fields, which are generated by the pionic and hydrogen atoms.
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Details can be found in\
[1] K.Y.: Spherical solutions to the Klein-Gordon equation in the expanding universe. arXiv:2508.15812\
[2] K.Y.: Propagation of Dirac spherical waves in the expanding universe. arXiv:2606.20483 |
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