Results 41 to 50 of about 61,982,689 (238)
Comment on Coleman-DeLuccia instantons
SciPost Physics, 2022 We complete an old argument that causal diamonds in the crunching region of the Lorentzian continuation of a Coleman-Deluccia instanton for transitions out of de Sitter space have finite area, and provide quantum models consistent with the principle ...
Tom Banks, Bingnan Zhang
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, 1994 To resolve infrared problems with the de~Sitter invariant vacuum, we argue that the history of the de~Sitter phase is crucial. We illustrate how either (1)~the diagonalization of the Hamiltonian for long-wavelength modes or (2)~an explicit modification of the metric in the distant past leads to natural infrared cutoffs.
Dolgov, A. D. +2 more
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Statistical entropy of de Sitter space [PDF]
Journal of High Energy Physics, 1998 5 pages, harvmac.
Maldacena, Juan, Strominger, Andrew
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Revise the Phase-Space Analysis of the Dynamical Spacetime Unified Dark Energy Cosmology
Universe, 2023 We analyze the phase-space of an alternate scalar field cosmology that aims to combine the concepts of dark energy and the dark sector. The investigation focuses on stationary points within this phase-space, considering different functional forms of the ...
Andronikos Paliathanasis
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Quantum steering for continuous variable in de Sitter space
European Physical Journal C: Particles and Fields, 2020 We study the distribution of quantum steerability for continuous variables between two causally disconnected open charts in de Sitter space. It is shown that quantum steerability suffers from “sudden death” in de Sitter space, which is quite different ...
Cuihong Wen, Jieci Wang, Jiliang Jing
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String with deformed dispersion relation
European Physical Journal C: Particles and Fields, 2022 We study string theory with momentum living on de Sitter space. We argue that consistency of the theory implies that the global momentum can be defined on de Sitter space.
J. Klusoň
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The Minkowski inequality in de Sitter space [PDF]
Pacific Journal of Mathematics, 2021 The classical Minkowski inequality in the Euclidean space provides a lower bound on the total mean curvature of a hypersurface in terms of the surface area, which is optimal on round spheres. In this paper we employ a locally constrained inverse mean curvature flow to prove a properly defined analogue in the Lorentzian de Sitter space.
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Thermodynamic properties of higher-dimensional dS black holes in dRGT massive gravity
European Physical Journal C: Particles and Fields, 2020 On the basis of the state parameter of de Sitter space-time satisfying the first law of thermodynamics, we can derive some effective thermodynamic quantities. When the temperature of the black hole horizon is equal to that of the cosmological horizon, we
Yubo Ma +5 more
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FEBS Letters, EarlyView.Plasma membranes contain dynamic nanoscale domains that organize lipids and receptors. Because viruses operate at similar scales, this architecture shapes early infection steps, including attachment, receptor engagement, and entry. Using influenza A virus and HIV‐1 as examples, we highlight how receptor nanoclusters, multivalent glycan interactions ...
Jan Schlegel, Christian Sieben
wiley +1 more source
Islands in proliferating de Sitter spaces
Journal of High Energy Physics, 2023 Abstract We study two-dimensional de Sitter universe which evolves and proliferates according to the Ginsparg-Perry-Bousso-Hawking mechanism, using Jackiw-Teitelboim gravity coupled to conformal matter. Black holes are generated by quantum gravity effects from pure de Sitter space and then evaporate to yield multiple disjoint de ...
Jong-Hyun Baek, Kang-Sin Choi
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