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Alexander Yu. Kamenshchik
Researcher at Istituto Nazionale di Fisica Nucleare
Publications - 179
Citations - 7076
Alexander Yu. Kamenshchik is an academic researcher from Istituto Nazionale di Fisica Nucleare. The author has contributed to research in topics: Scalar field & Quantum cosmology. The author has an hindex of 33, co-authored 170 publications receiving 6541 citations. Previous affiliations of Alexander Yu. Kamenshchik include Landau Institute for Theoretical Physics & University of Bologna.
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An Alternative to quintessence
TL;DR: In this paper, the authors consider a FRW cosmological model with an exotic fluid known as Chaplygin gas and show that the resulting evolution of the universe is not in disagreement with the current observation of cosmic acceleration.
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Can the Chaplygin gas be a plausible model for dark energy
TL;DR: In this article, two cosmological models representing the flat Friedmann universe filled with a Chaplygin fluid, with or without dust, are analyzed in terms of the recently proposed ''statefinder'' parameters.
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Tachyons, scalar fields, and cosmology
TL;DR: In this paper, the role of tachyon fields in cosmology as compared to the well-established use of minimally coupled scalar fields is investigated, and a specific one-parameter family of tachyonic models based on a perfect fluid mixed with a positive cosmological constant is studied.
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Asymptotic freedom in inflationary cosmology with a non-minimally coupled Higgs field
Andrei O. Barvinsky,Alexander Yu. Kamenshchik,Claus Kiefer,Alexei A. Starobinsky,Alexei A. Starobinsky,Christian F. Steinwachs +5 more
TL;DR: In this paper, the authors consider the renormalization group improvement in the theory of the Standard Model Higgs boson playing the role of an inflaton with a strong non-minimal coupling to gravity.
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Question of quantum equivalence between Jordan frame and Einstein frame
TL;DR: In this article, the equivalence between two different parametrizations of fields that are commonly used in cosmology, the so-called Jordan frame and the Einstein frame, were investigated in the framework of scalar-tensor theory.