DOAJ Open Access 2023

CMB Power Spectrum in the Emergent Universe with K-Essence

Qihong Huang Kaituo Zhang He Huang Bing Xu Feiquan Tu

Abstrak

The emergent universe provides a possible method to avoid the Big Bang singularity by considering that the universe stems from a stable Einstein static universe rather than the singularity. Since the Einstein static universe exists before inflation, it may leave some relics in the CMB power spectrum. In this paper, we analyze the stability condition for the Einstein static universe in general relativity with k-essence against both the scalar and tensor perturbations. Furthermore, we find the emergent universe can be successfully realized by constructing a scalar potential and an equation of state parameter. Solving the curved Mukhanov–Sasaki equation, we obtain the analytical approximation for the primordial power spectrum, and then depict the TT-spectrum of the emergent universe. The results show that both the primordial power spectrum and CMB TT-spectrum are suppressed on large scales.

Topik & Kata Kunci

Elementary particle physics

Penulis (5)

Qihong Huang

Kaituo Zhang

He Huang

Bing Xu

Feiquan Tu

Format Sitasi

APA MLA BibTeX

Huang, Q., Zhang, K., Huang, H., Xu, B., Tu, F. (2023). CMB Power Spectrum in the Emergent Universe with K-Essence. https://doi.org/10.3390/universe9050221

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Informasi Jurnal

Tahun Terbit: 2023
Sumber Database: DOAJ
DOI: 10.3390/universe9050221
Akses: Open Access ✓