From the 1 of 4 linked papers with an AI index.
4 papers
Propagation of Dirac spherical waves in the expanding universe
Karen Yagdjian
The paper derives explicit spherical solutions of the Dirac equation in a Friedmann‑Lemaître‑Robertson‑Walker universe with a de Sitter expansion, showing how wave functions such a…
Spherical solutions to the Klein-Gordon equation in the expanding universe
Karen Yagdjian
We produce an explicit formula for the wave function of the spherically symmetric fields emitted to the FLRW universe with the scale factor generated by the de~Sitter universe. As…
Semilinear Klein-Gordon equation in space-time of black hole, which is gaining mass in the universe with accelerating expansion
Karen Yagdjian, Anahit Galstian
In this paper, we consider the propagation of waves in the space-time of a single black hole with a static Schwarzschild radius in the expanding universe, namely, the solutions of…
Waves in cosmological background with static Schwarzschild radius in the expanding universe
Karen Yagdjian
In this paper, we prove the existence of global in time small data solutions of semilinear Klein-Gordon equations in space-time with a static Schwarzschild radius in the expanding…