DOAJ Open Access 2024

Primordial Gravitational Wave- and Curvature Perturbation-Induced Energy Density Perturbations

Zhe Chang Yu-Ting Kuang Xukun Zhang Jing-Zhi Zhou

Abstrak

We study the second-order scalar and density perturbations generated by Gaussian curvature perturbations and primordial gravitational waves in the radiation-dominated era. After presenting all the possible second-order source terms, we obtain the explicit expressions of the kernel functions and the power spectra of the second-order scalar perturbations. We show that the primordial gravitational waves might affect second-order energy density perturbation <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msup><mi>δ</mi><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></msup><mo>=</mo><mi>δ</mi><msup><mi>ρ</mi><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow></msup><mo>/</mo><msup><mi>ρ</mi><mrow><mo>(</mo><mn>0</mn><mo>)</mo></mrow></msup></mrow></semantics></math></inline-formula> significantly. The effects of primordial gravitational waves are studied in terms of different kinds of primordial power spectra.

Topik & Kata Kunci

Elementary particle physics

Penulis (4)

Zhe Chang

Yu-Ting Kuang

Xukun Zhang

Jing-Zhi Zhou

Format Sitasi

APA MLA BibTeX

Chang, Z., Kuang, Y., Zhang, X., Zhou, J. (2024). Primordial Gravitational Wave- and Curvature Perturbation-Induced Energy Density Perturbations. https://doi.org/10.3390/universe10010039

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Informasi Jurnal

Tahun Terbit: 2024
Sumber Database: DOAJ
DOI: 10.3390/universe10010039
Akses: Open Access ✓