期刊
CLASSICAL AND QUANTUM GRAVITY
卷 29, 期 8, 页码 -出版社
IOP Publishing Ltd
DOI: 10.1088/0264-9381/29/8/083001
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资金
- Ministry of Education, Science and Culture of Japan [22540274]
- JSPS [21111006]
- Global COE Program 'The Next Generation of Physics, Spun from Universality and Emergence'
- [21244033]
- [22244030]
- Grants-in-Aid for Scientific Research [22244030, 22540274, 21111006] Funding Source: KAKEN
We review an inflationary scenario with the anisotropic expansion rate. An anisotropic inflationary universe can be realized by a vector field coupled with an inflaton, which can be regarded as a counter example to the cosmic no-hair conjecture. We show the generality of anisotropic inflation and derive a universal property. We formulate cosmological perturbation theory in anisotropic inflation. Using the formalism, we show that anisotropic inflation gives rise to the statistical anisotropy in primordial fluctuations. We also explain a method to test anisotropic inflation using the cosmic microwave background radiation.
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