Results 211 to 220 of about 61,982,689 (238)

Neutrino Oscillations in the de Sitter and the Anti-de Sitter Space-Time

International Journal of Theoretical Physics, 2011
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Ren, Jun, Pan, Yuan-Yue
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De Sitter Space

2007
These lectures present an elementary discussion of some background material relevant to the problem of de Sitter quantum gravity. The first two lectures discuss the classical geometry of de Sitter space and properties of quantum field theory on de Sitter space, especially the temperature and entropy of de Sitter space.
M. Spradlin, A. Strominger, A. Volovich
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Flat directions in de Sitter space

Physical Review D, 1994
The one loop level effective potential along the flat direction in global supersymmetric models is evaluated in de Sitter space. In flat space the direction \ensuremath{\varphi} only has a curvature determined by the supersymmetry soft breaking mass term ${\mathit{m}}^{2}$${\mathrm{\ensuremath{\varphi}}}^{2}$ and in the supersymmetric limit m ...
, Suzuki, , Tanaka
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Space-like submanifolds in de Sitter spaces

Journal of Physics A: Mathematical and General, 2001
Let \(M_p^{n+p}(c)\) be a de Sitter space form. \textit{K. Akutagawa} [Math. Z. 196, 13--19 (1987; Zbl 0611.53047)] and \textit{J. Ramanathan} [Indiana Univ. Math. J. 36, 349--359 (1987; Zbl 0626.53041)] proved that a complete space-like hypersurface in the de Sitter space is totally umbilical if the mean curvature \(H\) is constant and satisfy the ...
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Wave Fields in de Sitter Space

Progress of Theoretical Physics, 1954
General wave equations for partIcles with arbitrary spin values in de Sitter space are investigated. The particles have generally two sorts of spin like quantum numbers. Solutions of the second order wave equations, which are to be satisfied by each component of wave functions, are obtained. They are composed of only discrete modes of wave oscillations.
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Wave Equations in the de Sitter Space

Physical Review, 1949
The second-order wave equation $\frac{{\ensuremath{\partial}}^{2}u}{\ensuremath{\partial}{x}_{i}\ensuremath{\partial}{x}^{i}}=0$ in five-dimensional flat space can reproduce approximately the field hitherto considered in four-dimensional space, if a de Sitter space with the radius $R$ is imbedded in the five-dimensional flat space and the derivative of
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De Sitter symplectic spaces and their quantizations

Mathematical Proceedings of the Cambridge Philosophical Society, 1974
The de Sitter group, Spin (4, 1), is a simply connected, semi-simple, ten-dimensional Lie group which can be contracted to the inhomogeneous Lorentz group. Physical systems with the de Sitter group as asymmetry group should resemble those of the inhomogeneous Lorentz group and may provide an alternative to these systems of special-relativistic physics.
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Fuzzy de Sitter and anti-de Sitter spaces

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021), 2022
Maja Buric, Bojana Brkic, Dusko Latas
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Thermodynamic instability of de Sitter space

Physical Review D, 1986
The generalized second law of thermodynamics is applied to fluctuations in the Hawking temperature of the cosmological event horizon in de Sitter spacetime. Fluctuations which decrease the temperature, thereby decreasing the scalar curvature, increase the generalized entropy S.
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Asymptotic States and S-Matrix Operator in de Sitter Ambient Space Formalism

Universe, 2023
Jean-Pierre Gazeau
exaly