73 citations · 173 across the 10 of their papers we have counts for
16 papers
Effective action and Schwinger-DeWitt technique in DGP brane models
A. O. Barvinsky, D. V. Nesterov
We give blueprints of the Schwinger-DeWitt technique for the covariant curvature expansion of quantum effective action for the DGP type models in curved spacetime.
Effective action and heat kernel in a toy model of brane-induced gravity
A. O. Barvinsky, A. Yu. Kamenshchik, C. Kiefer +1
We apply a recently suggested technique of the Neumann-Dirichlet reduction to a toy model of brane-induced gravity for the calculation of its quantum one-loop effective action. Thi…
Thermodynamics via Creation from Nothing: Limiting the Cosmological Constant Landscape
A. O. Barvinsky, A. Yu. Kamenshchik
The creation of a quantum Universe is described by a {\em density matrix} which yields an ensemble of universes with the cosmological constant limited to a bounded range $Λ_{\rm mi…
Quantum Effective Action in Spacetimes with Branes and Boundaries: Diffeomorphism Invariance
A. O. Barvinsky
We construct a gauge-fixing procedure in the path integral for gravitational models with branes and boundaries. This procedure incorporates a set of gauge conditions which gauge aw…
Cosmological Landscape From Nothing: Some Like It Hot
A. O. Barvinsky, A. Yu. Kamenshchik
We suggest a novel picture of the quantum Universe -- its creation is described by the {\em density matrix} defined by the Euclidean path integral. This yields an ensemble of unive…
Quantum Effective Action in Spacetimes with Branes and Boundaries
A. O. Barvinsky, D. V. Nesterov
We construct quantum effective action in spacetime with branes/boundaries. This construction is based on the reduction of the underlying Neumann type boundary value problem for the…