Cosmological Acceleration as a Consequence of Quantum de Sitter Symmetry
نویسندگان
چکیده
منابع مشابه
de Sitter group as a symmetry for optical decoherence
Stokes parameters form a Minkowskian 4-vector under various optical transformations. As a consequence, the resulting two-by-two density matrix constitutes a representation of the Lorentz group. The associated Poincaré sphere is a geometric representation of the Lorentz group. Since the Lorentz group preserves the determinant of the density matrix, it cannot accommodate the decoherence process t...
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The formalism of Fantappié-Arcidiacono Projective General Relativity –also known as De Sitter Relativityhas recently been revised in order to make possible cosmological models with expansion, similarly to ordinary Friedmann cosmology formulated within the context of General Relativity. In this article, several consequences of interest in the current cosmological debate are examined and discusse...
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With the basic cosmological relations that agree with the recent observations, simple expressions are suggested concerning the value of cosmological constant(Λ). A large contribution of quantum vacuum to the energy momentum tensor does not agree with the observed cosmos. However,one requires the presence of positive Λ to make the various observations consistent. After a review of the effect of ...
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The graviton propagator in a de Sitter background is found to be divergent. We show that as a consequence of this divergence, de Sitter space is not a solution of the equations of motion of the complete theory. If we start from de Sitter space-as a classical ground state, quantum corrections change it into flat Minkowski.
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ژورنال
عنوان ژورنال: Physics of Particles and Nuclei Letters
سال: 2020
ISSN: 1547-4771,1531-8567
DOI: 10.1134/s1547477120020119