107 citations
- Institució Catalana de Recerca i Estudis AvançatsES6 papers
- Institute of Space SciencesES6 papers
- Tomsk State University of Control Systems and Radio-ElectronicsRU6 papers
- Australian National UniversityAU5 papers
- University of the WitwatersrandZA5 papers
- Joint Institute for Nuclear ResearchRU3 papers
- Universidad de ValladolidES3 papers
- Georgia Institute of TechnologyUS2 papers
- Indian Institute of Science Education and Research KolkataIN2 papers
- Institute of Metal Superplasticity ProblemsRU2 papers
- Institute of PhysicsPL2 papers
- Kazan Federal UniversityRU2 papers
49 papers
Charged topological geons with a self-gravitating scalar field
Alexander Tsirulev
A topological geon is an asymptotically (anti-)de Sitter or flat spacetime with topology , where is the punctured projective space, $M=\mathbb{R}P^3\backsla…
Computation of operator exponentials using the Dunford-Cauchy integral
Alexander Tsirulev
We consider an n-qubit quantum system with a Hamiltonian, defined by an expansion in the Pauli basis, and propose a new algorithm for classical computing the exponential of the Ham…
Tidal Disruption of Stars by Supermassive Black Holes and Naked Singularities with Scalar Hair
Eduardo Andre, Alexander Tsirulev
In this paper we study tidal forces near strongly gravitating objects at the centers of galaxies. In our approach, dark matter surrounding the centers of galaxies is modeled by a n…
Early Dark Energy with Power-law F(R) Gravity
Sergei D. Odintsov, V. K. Oikonomou, German S. Sharov
We study a power-law gravity with an early dark energy term, that can describe both the early-time and the late-time acceleration of the Universe. We confront this scenario…
Modified Equations of State for Dark Energy and Observational Limitations
German S. Sharov, Vasily E. Myachin
Cosmological models with variable and modified equations of state for dark energy are confronted with observational data, including Type Ia supernovae, Hubble parameter data …
Modelling and testing the equation of state for (Early) dark energy
Shin'ichi Nojiri, Sergei D. Odintsov, Diego Saez-Chillon Gomez +1
A general equation of state is considered for analysing the possible behaviors for (Early) dark energy that alleviates the Hubble parameter tension problem. By departing from the p…