Dark Energy and Spacetime Symmetry
The Petrov classification of stress-energy tensors provides a model-independent definition of a vacuum by the algebraic structure of its stress-energy tensor and implies the existence of vacua whose symmetry is reduced as compared with the maximally symmetric de Sitter vacuum associated with the Ein...
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-03-01
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| Series: | Universe |
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| Online Access: | http://www.mdpi.com/2218-1997/3/1/20 |