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astro-ph.CO2026
Gravitational waves from oscillons in a generalized exponential plateau potential
Peter Lott, Tuan Q. Do
We study oscillon formation and gravitational wave production in a generalized exponential plateau inflationary potential. Using Floquet analysis, we identify parametric instabilit…
gr-qc2026
Unstable de Sitter inflationary solution in sixth-order gravity
Tuan Q. Do
A sixth-order gravity, which involves not only two leading terms, and , but also quadratic curvature terms along with cubic curvature ones, wi…
physics.gen-ph2026
Effect of on the stability of de Sitter solution of the generalized Einsteinian cubic gravity
Tuan Q. Do
In this paper, we would like to investigate whether a generalized Einsteinian cubic gravity, in which three possible cubic interactions , , and are…