Complex Field Inflation

Zhang, Ruopeng; Zheng, Sibo

Complex Field Inflation

Ruopeng Zhang
(
- Chongqing U.
)
,
Sibo Zheng
(
- Chongqing U.
)

Jun 2, 2021

15 pages

e-Print:

2106.00977 [astro-ph.CO]

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Abstract: (arXiv)

We report first study of complex field inflation. Although understood as a specific two-field inflation, a complex field inflation is able to make more robust model predictions on primordial curvature perturbation. Explicitly we discuss the model realizations of complex chaotic and exponential inflation in various large-field contexts. Both complex field models contain a single complex scalar together with only two free parameters. Using numerical handles aimed to calculate primordial curvature perturbation from multifield inflation, we show that both models are compatible with current Planck data, and the individual surviving parameter space can be substantially or fully probed by future CMB-S4 experiments.

Note:

14 pages, 2 figures; v2: a different attempt to address issues of multifield inflation, most of materials new

power spectrum: scalar
perturbation: primordial
higher-order: 0
perturbation: scalar
inflation: model
slow-roll approximation
bispectrum
chaos
satellite: Planck
cosmic background radiation

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