Results 21 to 30 of about 14,231,605 (294)
Bulk Viscous Fluid in Symmetric Teleparallel Cosmology: Theory versus Experiment
Universe, 2022 The standard formulation of General Relativity Theory, in the absence of a cosmological constant, is unable to explain the responsible mechanism for the observed late-time cosmic acceleration.
Raja Solanki +3 more
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The null energy condition and cosmology [PDF]
Theoretical and Mathematical Physics, 2008 13 pages, Latex, 1 ...
Aref'eva, I. Ya., Volovich, I. V.
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ENERGY CONDITIONS AND THEIR COSMOLOGICAL IMPLICATIONS [PDF]
COSMO-99, 2000 The energy conditions of general relativity permit one to deduce very powerful and general theorems about the behaviour of strong gravitational fields and cosmological geometries. However, the energy conditions these theorems are based on are beginning to look a lot less secure than they once seemed: (1) there are subtle quantum effects that violate ...
Visser, Matt, Barcelo, Carlos
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Inhomogeneous and Radiating Composite Fluids
Entropy, 2021 We consider the energy conditions for a dissipative matter distribution. The conditions can be expressed as a system of equations for the matter variables.
Byron P. Brassel +2 more
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Quasilocal energy conditions [PDF]
Physical Review D, 1995 The classical value of the Hamiltonian for a system with timelike boundary has been interpreted as a quasilocal energy. This quasilocal energy is not positive definite. However, we derive a `quasilocal dominant energy condition' which is the natural consequence of the local dominant energy condition.
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Recommendations concerning energy information model documentation, public access, and evaluation [PDF]
, 1979 In this study we provide an analysis of the factors underlying Congressional concern regarding model documentation, policies for public access, and evaluation procedures of the Energy Information Administration (EIA) and its predecessor agencies; we also
Wood, D.O. +3 more
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Dynamical Wormholes and Energy Conditions [PDF]
Progress of Theoretical Physics, 1995 A class of exact solutions of the Einstein field equations representing non-static wormholes that obey the {\em weak and dominant energy conditions } is presented. Hence, in principle, these wormholes can be built with less exotic matter than the static ones.
Wang, Anzhong, Letelier, Patricio S.
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Scientific Reports, 2021 Regarded as doped binary hydrides, ternary hydrides have recently become the subject of investigation since they are deemed to be metallic under pressure and possibly potentially high-temperature superconductors.
Prutthipong Tsuppayakorn-aek +4 more
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On a Class of Harko-Kovacs-Lobo Wormholes
Universe, 2022 The Harko, Kovács, and Lobo wormhole (HKLWH) metric contains two free parameters: one is the wormhole throat r0, and the other is a dimensionless deviation parameter γ with values ...
Ramis Kh. Karimov +2 more
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Energy Conditions for Hamiltonicity of Graphs [PDF]
Discrete Dynamics in Nature and Society, 2014 LetGbe an undirected simple graph of ordern. LetA(G)be the adjacency matrix ofG, and letμ1(G)≤μ2(G)≤⋯≤μn(G)be its eigenvalues. The energy ofGis defined asℰ(G)=∑i=1n|μi(G)|. Denote byGBPTa bipartite graph. In this paper, we establish the sufficient conditions forGhaving a Hamiltonian path or cycle or to be Hamilton-connected in terms of the energy of ...
Guidong Yu +3 more
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