34 citations · 56 across the 3 of their papers we have counts for
9 papers
Time and Evolution in Quantum and Classical Cosmology
Alexander Yu. Kamenshchik, Jeinny Nallely Perez Rodriguez, Tereza Vardanyan
We analyze the issue of dynamical evolution and time in quantum cosmology. We emphasize the problem of choice of phase space variables that can play the role of a time parameter in…
Renormalization group inspired autonomous equations for secular effects in de Sitter space
Alexander Yu. Kamenshchik, Tereza Vardanyan
We develop a method for treating a series of secularly growing terms obtained from quantum perturbative calculations: autonomous first-order differential equations are constructed…
Spatial Kasner solution and an infinite slab with constant energy density
Alexander Yu. Kamenshchik, Tereza Vardanyan
We study the solutions of the Einstein equations in the presence of a thick infinite slab with constant energy density. When there is an isotropy in the plane of the slab, we find…
Duality between static spherically or hyperbolically symmetric solutions and cosmological solutions in scalar-tensor gravity
Alexander Yu. Kamenshchik, Ekaterina O. Pozdeeva, Alexei A. Starobinsky +4
We study static spherically and hyperbolically symmetric solutions of the Einstein equations in the presence of a conformally coupled scalar field and compare them with those in th…
Non-Canonical Inflation and Primordial Black Holes Production
Alexander Y. Kamenshchik, Alessandro Tronconi, Tereza Vardanyan +1
We study a mechanism for the amplification of the inflationary scalar perturbation when the inflaton field action is non-canonical, i.e. the inflaton kinetic term has a non-standar…
Exact solutions of the Einstein equations for an infinite slab with a constant energy density
Alexander Yu. Kamenshchik, Tereza Vardanyan
We find exact static solutions of the Einstein equations in the spacetime with plane symmetry, where an infinite slab with finite thickness and homogeneous energy (mass) density is…