74 citations · 151 across the 12 of their papers we have counts for
12 papers
Is there ghost and tachyon free bounce in UV complete gravity theory?
Hao Hu, Alexey S. Koshelev, Abhishek Naskar
Analytic infinite derivative gravity theories provide a renormalizable and ghost-free description of gravity around covariantly constant backgrounds. These theories can have non-si…
Convergent sum of EFT corrections to Schwarzschild metric requires UV locality
Yang Liu, Alexey S. Koshelev, Anna Tokareva +1
Corrections to vacuum black hole solutions of general relativity (GR) are considered in an effective field theory (EFT) framework, perturbatively in EFT coefficients, focusing on t…
Cancellation of UV divergences in ghost-free infinite derivative gravity
Alexey S. Koshelev, Oleg Melichev, Leslaw Rachwal
We consider the most general covariant gravity action up to terms that are quadratic in curvature. These can be endowed with generic form factors, which are functions of the d'Alem…
Energy conditions for regular black holes in EFT of gravity
Ziyue Zhu, Alexey S. Koshelev, Yang Liu +1
As Einstein's gravity is a non-renormalizable theory, it can be a good description of physics only at the scales of energy or spacetime curvature below the Planck mass. Moreover, i…
Cosmic inflation in non-perturbative quantum gravity
Alexey S. Koshelev, Abhishek Naskar
String field theory motivated infinite-derivative models lead to non-local gravity modifications which form a promising class of quantum gravity candidates. In this paper we invest…
Quasi-normal modes in non-perturbative quantum gravity
Alexey S. Koshelev, Chenxuan Li, Anna Tokareva
Non-pertrubative quantum gravity formulated as a unitary four-dimensional theory suggests that certain amount of non-locality, such as infinite-derivative operators, can be present…
Secondary Gravitational Waves in Non-local Starobinsky inflation
Andrea Addazi, Alexey S. Koshelev, Shi Pi +1
We show how infinite derivative modifications of gravity impact on the stochastic background of Gravitational Waves from early Universe. The generic property of the ghost-free theo…
Non-perturbative quantum gravity denounces singular Black Holes
Alexey Koshelev, Anna Tokareva
Although General Relativity predicts the presence of a singularity inside of a Black Hole, it is not a complete theory of gravity. A real structure of a Black Hole interior near an…
Gauge Invariance and Tachyon Condensation in Cubic Superstring Field Theory
I. Ya. Aref'eva, D. M. Belov, A. S. Koshelev +1
The gauge invariance of cubic open superstring field theory is considered in a framework of level truncation, and applications to the tachyon condensation problem are discussed. As…
Tachyon condensation in cubic superstring field theory
I. Ya. Aref'eva, D. M. Belov, A. S. Koshelev +1
It has been conjectured that at the stationary point of the tachyon potential for the non-BPS D-brane or brane-anti-D-brane pair, the negative energy density cancels the brane tens…
On Stable Sector in Supermembrane Matrix Model
I. Ya. Aref'eva, A. S. Koshelev, P. B. Medvedev
We study the spectrum of SU(2) x SO(2) matrix supersymmetric quantum mechanics. We use angular coordinates that allow us to find an explicit solution of the Gauss law constraints a…
Note on the Massive Rarita-Schwinger Field in the AdS/CFT correspondence
A. S. Koshelev, O. A. Rytchkov
We consider a massive Rarita-Schwinger field on the Anti-de Sitter space and solve the corresponding equations of motion. We show that appropriate boundary terms calculated on-shel…