The gravitational energy density of the Universe
Keyword(s):
The teleparallel gravitational energy–momentum tensor density of the Friedmann–Lemaître–Robertson–Walker spacetime is calculated and analyzed: it is decomposed into density, isotropic pressure, non-isotropic pressures, and the heat-flux 4-vector; the antisymmetric part is decomposed into “electric” and “magnetic” components. It is found that the gravitational field obeys a radiation-like equation of state, the antisymmetric part does not contribute to the gravitational energy–momentum; and the total energy density, the non-isotropic pressures and the heat-flux 4-vector vanish for spatially flat universes. Finally, it is verified that the field equations have a well-defined vacuum.
2003 ◽
Vol 12
(05)
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pp. 925-939
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Keyword(s):
2017 ◽
Vol 32
(28)
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pp. 1750151
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2003 ◽
Vol 12
(06)
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pp. 1095-1112
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Keyword(s):
2021 ◽
pp. 2150104
2006 ◽
Vol 21
(21)
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pp. 4373-4406
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Keyword(s):