De Sitter Spacetime
Graviton two-point function in 3+1 static de Sitter spacetime
... of de Sitter spacetime and found it to be finite in the ...1)-dimensional de Sitter ...1)-dimensional de Sitter spacetime in the static ...in de ...
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Multi-String Solutions by Soliton Methods in De Sitter Spacetime
... dimensional de Sitter ...in de Sitter [15] and then we “dress” ...in de Sitter spacetime as ...in de Sitter universe is essentially different from the ...
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Gibbons-Hawking radiation of gravitons in the Poincare and static patches of de Sitter spacetime
... of de Sitter spacetime ...the de Sitter group for massless minimally-coupled scalar field in de Sitter spacetime ...no de Sitter-invariant vacuum ...
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Exact String Solutions in 2+1-Dimensional De Sitter Spacetime
... in de Sitter spacetime will generically tend either to inflate at the same rate as the universe (when α → + ∞ ) or to collapse to a point (when α → −∞ ...
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Hadamard renormalized scalar field theory on anti-de Sitter spacetime
... Décanini and Folacci [33] have implemented HR in an elegant framework for a free scalar field coupled to a general n-dimensional spacetime. Reference [33] serves as a practical approach to higher-dimensional ...
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Vacuum state in de Sitter spacetime with static charts
... θ = 0, but the behavior is similar for other values of θ unless θ takes values around π. This result can be compared with the previous works which computed the entanglement entropy in de Sitter ...
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Perturbative Quantum Gravity on de Sitter Spacetime
... We will analyse perturbative quantum gravity on de Sitter spacetime. We propose a new type of inner product for modes on de Sitter spacetime. This inner product is used to mode ...
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Schwinger mechanism in electromagnetic field in de Sitter spacetime
... In the limit of zero electric field E = 0, the first term in the square bracket of eq. (7) vanishes and the second term is the dS radiation weighted by the density of states of the magnetic field background. Therefore ...
5
Analysis of scalar and fermion quantum field theory on anti-de Sitter spacetime
... anti-de Sitter space-time. Anti-de Sitter space-time is maximally symmetric and this enables expressions for the scalar and fermion vacuum Feynman Green’s functions to be derived in closed ...
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Quantum corrections for spinning particles in de Sitter
... in de Sitter spacetime play an important role in cosmology, not only because de Sitter approximates very well most of the inflationary period in the standard cosmological model [26–31], ...
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Towards a Fisher-Information Description of Complexity in de Sitter Universe
... on-shell de Sitter action has the same form as Fisher information after regarding the scale factor a ( τ ) as PDF p ( x ) ...of de Sitter ...vacuum de Sitter ...or de ...
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Massless Interacting Scalar Fields in de Sitter space
... Lorentzian de Sitter spacetime, and in particular to obtain n -point functions that respect the de Sitter ...Lorentzian de Sitter ...the de Sitter ...
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Compact space like hypersurfaces in de Sitter space
... Minkowski formulas provide us with a convenient tool in the study of hypersurfaces. One can refer to [12] for the well-known version for space forms. Many interesting results have been got in the study of hypersurfaces ...
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De Sitter limit analysis for dark energy and modified gravity models
... have a clear physical interpretation. Therefore, in this paper we will try to address the issue of giving a value for the mass of the perturbation field which describes the energy density of the scalar field ϕ , i.e. of ...
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Epistemic "Holes" in Spacetime
... a spacetime is EH(f)-free, then it also ...mutilated spacetime will have an epistemic hole of some ...Minkowski spacetime is EH(f)-free and EH(g)-free by ...
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A New Characterization of Totally Umbilical Hypersurfaces in de Sitter Space
... S + should be the totally umbilical ones. This conjecture motivated the work of an important number of authors who considered the problem of characterizing the totally umbilical spacelike hypersurfaces of de ...
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On perturbations of the Schwarzschild anti de sitter spaces of positive mass
... anti-de Sitter space of positive mass outside a compact set under restrictive hypotheses on the behavior of its isoperimetric surfaces, among them the assumption that the coordinate spheres near infinity ...
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Some Results on the Differential Geometry of Spacelike Curves in De Sitter Space
... This work develops the differential geometry of space- like curves on de-Sitter space in four-dimensional Lor- entzian space. The motivation for this work is the fact that the Euler parameters of spherical ...
5
On involute-evolute curve couple in the hyperbolic and de Sitter spaces
... This paper aims at showing that Frenet apparatus of an evolute curve can be formed in terms of Frenet apparatus of its involute curve in the hyperbolic (de Sitter) space. Also, we establish relationships ...
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Thermal expectation values of fermions on anti-de Sitter space-time
... The maximal symmetry of adS space-time also simplifies the study of higher-spin fields, again allowing closed-form expressions for the Feynman Green’s function to be derived in both the bosonic [9, 10] and fermionic [11, ...
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