E
Ermis Mitsou
Researcher at University of Zurich
Publications - 32
Citations - 747
Ermis Mitsou is an academic researcher from University of Zurich. The author has contributed to research in topics: Dark energy & General relativity. The author has an hindex of 14, co-authored 29 publications receiving 695 citations. Previous affiliations of Ermis Mitsou include University of Geneva & Columbia University.
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Nonlocal theory of massive gravity
TL;DR: In this paper, a fully covariant theory of massive gravity was proposed, which does not require the introduction of an external reference metric, and overcomes the usual problems of massive gravitation theories (fatal ghosts instabilities, acausality and van Dam-Veltman-Zakharov discontinuity).
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Cosmological dynamics and dark energy from nonlocal infrared modifications of gravity
TL;DR: In this article, the cosmological dynamics of a recently proposed infrared modification of the Einstein equations, based on the introduction of a nonlocal term constructed with m2gμν□-1R, where m is a mass parameter, are studied.
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Cosmological dynamics and dark energy from non-local infrared modifications of gravity
TL;DR: In this article, the cosmological dynamics of a recently proposed infrared modification of the Einstein equations, based on the introduction of a non-local term constructed with $m^2g_{\mu
u}\Box^{-1} R$, where $m$ is a mass parameter.
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Apparent ghosts and spurious degrees of freedom in non-local theories
TL;DR: In this article, it was shown that these apparent ghost-like instabilities do not describe actual propagating degrees of freedom, and there is no issue of ghost-induced quantum vacuum decay.
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Early dark energy from zero-point quantum fluctuations
TL;DR: In this article, a cosmological model with a dark energy density of the form ρ DE ( t ) = ρ X (t ) + ρ Z (t) was examined, and it was shown that the remaining quartic divergence can be reabsorbed into a redefinition of Newton's constant only under the assumption that ∇ μ 〈 0 | T μ ν | 0 〉 = 0, i.e. that the energy-momentum tensor of vacuum fluctuations is conserved in isolation.