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Andrei O. Barvinsky on Muck Rack

Andrei O. Barvinsky

As seen in: The Astronomical Journal, Physical Review B, EPJ
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Articles

The European Physical Journal C

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By Andrei O. Barvinsky, Dominik Schwarz
| EPJ
Eur. Phys. J. C (2024) 84: 72 https://doi.org/10.1140/epjc/s10052-024-12421-5 Editorial Alexei Starobinsky (1948–2023) 1a and 2 1 Lebedev Physics Institute, Leninskii pr., 53, 119991, Moscow, Russia 2 Fakultät für Physik, Universität Bielefeld, Postfach 100131, 33501, Bielefeld, Germany a barvin@td.lpi.ru This article has no abstract.
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Nonequilibrium Schwinger-Keldysh formalism for density matrix states: Analytic properties and implications in cosmology

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By Andrei O. Barvinsky, Leninskie Gory, Nikita Kolganov, Institutskiy pereulok
| Physical Review B
Motivated by cosmological Hartle-Hawking and microcanonical density matrix prescriptions for the quantum state of the Universe we develop a Schwinger-Keldysh in-in formalism for generic nonequilibrium dynamical systems with the initial density matrix.
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Asymptotic freedom in ($3+1$)-dimensional projectable Ho\ifmmode \check{r}\else \v{r}\fi{}ava gravity: Connecting the ultraviolet and infrared domains

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By Andrei O. Barvinsky, Leninskie Gory, Alexander Kurov, Sergey M. Sibiryakov
| Physical Review B
We investigate the renormalization group flow of projectable Hořava gravity in (3+1) dimensions generated by marginal operators with respect to the Lifshitz scaling. The flow possesses a number of asymptotically free fixed points. We find a family of trajectories connecting one of these fixed points in the ultraviolet to the region of the parameter space where the kinetic term of the theory acquires the general relativistic form.
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