2014 Fiscal Year Final Research Report
Entanglement of primordial fluctuation
| Project/Area Number |
23540297
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
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| Research Institution | Nagoya University |
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Principal Investigator |
YASUSADA Nambu 名古屋大学, 理学(系)研究科(研究院), 准教授 (40212112)
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| Project Period (FY) |
2011-04-28 – 2015-03-31
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| Keywords | entanglement / inflation / quantum correlation / detector model / negativity |
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| Outline of Final Research Achievements |
We investigate entanglement structure of a quantum field in the inflationary universe using a particle detector model. Entanglement of the quantum field can be detectable by analyzing quantum correlation between two detectors interacting with the quantum field. We found that it is impossible to detect entanglement of the quantum field for detectors separated with distances larger than the Hubble horizon scale. This result implies that the quantum field in the inflationary universe loses its quantum nature for super Horizon scale and can be treated as a classical field.
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| Free Research Field |
重力理論
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