93 citations · 273 across the 8 of their papers we have counts for
8 papers
Singularity crossing, transformation of matter properties and the problem of parametrization in field theories
A. Yu. Kamenshchik
We investigate particular cosmological models, based either on tachyon fields or on perfect fluids, for which soft future singularities arise in a natural way. Our main result is t…
Darkness without dark matter and energy -- generalized unimodular gravity
A. O. Barvinsky, A. Yu. Kamenshchik
We suggest a Lorentz non-invariant generalization of the unimodular gravity theory, which is classically equivalent to general relativity with a locally inert (devoid of local degr…
Selection rules for the Wheeler-DeWitt equation in quantum cosmology
A. O. Barvinsky, A. Yu. Kamenshchik
Selection of physically meaningful solutions of the Wheeler-DeWitt equation for the wavefunction in quantum cosmology, can be attained by a reduction of the theory to the sector of…
The problem of singularities and chaos in cosmology
A. Yu. Kamenshchik
We consider different aspects of the problem of cosmological singularity such as the BKL oscillatory approach to the singularity, the new features of the cosmological dynamics in t…
CFT driven cosmology and the DGP/CFT correspondence
A. O. Barvinsky, C. Deffayet, A. Yu. Kamenshchik
We present a dual 5D braneworld picture of a recently suggested model for a microcanonical description of a 4D cosmology driven by a conformal field theory with a large number of q…
Tolman-Oppenheimer-Volkoff equations in presence of the Chaplygin gas: stars and wormhole-like solutions
V. Gorini, A. Yu. Kamenshchik, U. Moschella +2
We study static solutions of the Tolman--Oppenheimer--Volkoff equations for spherically symmetric objects (stars) living in a space filled with the Chaplygin gas. Two cases are con…