Rest frame vacua of massive Klein–Gordon fields on spatially flat FLRW spacetimes
Abstract We propose a method of projecting the quantum states from a state space of a given geometry into another state space generated by a different geometry, taking care of the correct normalization which is crucial in interpreting the quantum theory. Thanks to this method we can define on any sp...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-07-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-020-8170-9 |