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Why does our universe expand with acceleration? What is dark energy? Although, no one knows, this phenomenon is well-modeled by the cosmological term in the Einstein equation. Noteworthy, quantum vacuum influences evolution of spacetime precisely as the cosmological constant does. However, theoretical estimates of the vacuum energy density indicate a catastrophe. We discuss this problem and examine a particular approach to its solution.

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I graduated from Moscow Institute of Physics and Technology, the Faculty of General and Applied Physics, and received a PhD degree from Karlsruhe Institute of Technology in 2012. Currently, I am a research associate at Ludwig Maximilian University of Munich. Research interests: quantum theory, general relativity and its modifications.

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