On the dual interpretation of zero-curvature Friedmann-Robertson-Walker models (Q2724821)
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scientific article; zbMATH DE number 1618255
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | On the dual interpretation of zero-curvature Friedmann-Robertson-Walker models |
scientific article; zbMATH DE number 1618255 |
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On the dual interpretation of zero-curvature Friedmann-Robertson-Walker models (English)
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18 May 2002
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zero-curvature Friedmann-Robertson Walker spacetime
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stress-energy tensor
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dual interpretation
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0.8764437
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0.8738088
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0.8692259
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0.8680692
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0.8655547
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0.86185694
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0.86168647
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0.8606777
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The starting point of this study is the remark that the energy-momentum tensor field of a spacetime, determined geometrically from the metric, has no a priori physical significance. On the same spacetime, this tensor field may be interpreted in several (conceptually different) ways. The authors consider a zero-curvature Robertson-Walker spacetime, whose (same) energy-momentum tensor arises from a perfect fluid flow or from a dissipative fluid. Moreover, necessary conditions are found for a transition from the first state to the second one, by passing through a specific ``critical point''.
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