30 citations · 117 across the 8 of their papers we have counts for
4 papers · 1 filter
Generalized unimodular gravity as a form of k-essence
A. O. Barvinsky, N. Kolganov, A. Vikman
We consider modifications of general relativity characterized by a special noncovariant constraint on metric coefficients, which effectively generates a perfect-fluid type of matte…
Quantum cosmology at the turn of Millennium
A. O. Barvinsky
A brief review of the modern state of quantum cosmology is presented as a theory of quantum initial conditions for inflationary scenario. The no-boundary and tunneling states of th…
Open inflation from quantum cosmology with a strong nonminimal coupling
A. O. Barvinsky
We propose the mechanism of quantum creation of the open Universe in the observable range of values of . This mechanism is based on the no-boundary quantum state with the Hawkin…
Quantum Origin of the Early Universe and the Energy Scale of Inflation
A. O. Barvinsky, A. Yu. Kamenshchik
Quantum origin of the early inflationary Universe from the no-boundary and tunnelling quantum states is considered in the one-loop approximation of quantum cosmology. A universal e…