Semi-Classical Einstein Equations: Descend to the Ground State
The time-dependent cosmological term arises from the energy-momentum tensor calculated in a state different from the ground state. We discuss the expectation value of the energy-momentum tensor on the right hand side of Einstein equations in various (approximate) quantum pure as well as mixed states...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/6/6/74 |