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European Physical Journal C: Particles and Fields, 2018 We discuss properties of fuzzy de Sitter space defined by means of algebra of the de Sitter group $$\text {SO}(1,4)$$ SO(1,4) in unitary irreducible representations.
Maja Burić +2 more
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Spiky strings in de Sitter space [PDF]
Journal of High Energy Physics, 2021 We study semiclassical spiky strings in de Sitter space and the corresponding Regge trajectories, generalizing the analysis in anti-de Sitter space. In particular we demonstrate that each Regge trajectory has a maximum spin due to de Sitter acceleration,
Mitsuhiro Kato +4 more
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Asymptotic States and S-Matrix Operator in de Sitter Ambient Space Formalism
Universe, 2023 Within the de Sitter ambient space framework, the two different bases of the one-particle Hilbert space of the de Sitter group algebra are presented for the scalar case.
Mohammad Vahid Takook +2 more
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Entanglement in De Sitter space
Journal of High Energy Physics, 2022 Abstract This paper expands on two recent proposals, [12, 13] and [14], for generalizing the Ryu-Takayanagi and Hubeny-Rangamani-Takayanagi formulas to de Sitter space. The proposals (called the monolayer and bilayer proposals) are similar; both replace the boundary of AdS by the boundaries of static-patches — in other words event ...
Shaghoulian, Edgar, Susskind, Leonard
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Obstacles to constructing de Sitter space in string theory
Journal of High Energy Physics, 2021 There have been many attempts to construct de Sitter space-times in string theory. While arguably there have been some successes, this has proven challenging, leading to the de Sitter swampland conjecture: quantum theories of gravity do not admit stable ...
Michael Dine +4 more
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Complexity in de Sitter space [PDF]
Classical and Quantum Gravity, 2017 29 pages, v2: references ...
Reynolds, Alan P., Ross, Simon F.
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Emergent de Sitter Cosmology from Decaying Anti–de Sitter Space [PDF]
Physical Review Letters, 2018 Recent developments in string compactifications demonstrate obstructions to the simplest constructions of low energy cosmologies with positive vacuum energy. The existence of obstacles to creating scale-separated de Sitter solutions indicates a UV/IR puzzle for embedding cosmological vacua in a unitary theory of quantum gravity.
Souvik Banerjee +4 more
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Some characterizations of timelike rectifying curves in de sitter 3 space
Cumhuriyet Science Journal, 2020 De Sitter space is a non-flat Lorentzian space form with positive constant curvature which plays an important role in the theory of relativity. In this paper, we define the notions of timelike rectifying curve and timelike conical surface in De Sitter 3 ...
Mahmut Mak
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Microscopics of de Sitter Entropy from Precision Holography
Physical Review X, 2023 We calculate quantum corrections to the entropy of four-dimensional de Sitter space induced by higher-derivative terms in the gravitational action and by one-loop effects.
Nikolay Bobev +4 more
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De Sitter space and entanglement [PDF]
Classical and Quantum Gravity, 2019 We argue that the notion of entanglement in de Sitter space arises naturally from the non-trivial Lorentzian geometry of the spacetime manifold, which consists of two disconnected boundaries and a causally disconnected interior. In four bulk dimensions, we propose an holographic description of an inertial observer in terms of a thermofield double state
Cesar Arias, Felipe Diaz, Per Sundell
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