Personal information
Biography
My general field of research is Theoretical Physics and Cosmology. I have carried out and published some works which can be seen in the list of publications below. But the culmination of my research was in the Ph.D. program on the subject "scale dependency of inflationary power spectrum originated from non-trivial initial states". The obtained results are presented in some papers published in JHEP, PLB, EPJC, and MPLA. I have calculated corrections to the scalar perturbations spectra resulting from Asymptotic-de Sitter modes as the nontrivial initial states. To obtain these alternative modes, I have considered the asymptotic expansion of the Hankel functions to the far past time limit. I have examined the asymptotic-dS modes instead of the Bunch-Davies mode as the fundamental vacuum mode during inflation. It is shown that the obtained spectra including higher-order terms of corrections not only associated with the type of geometry (index of Hankel function) but also are sensitive to the fluctuations of space-time (gravitational waves) during inflation. The corrections are too tiny at far past the time limit but may have very important effects on the formation of large-scale structures. Also, our results are theoretically valid for any quasi-dS space-time and particularly confirmed the conventional results for the dS and flat space-time.
*** I am currently developing a theory based on the dynamics of cosmic voids to solve physical cosmology challenges.
My favorite projects:
• Void-Based Theory for the Late Universe:
" Surface tension of cosmic voids as a possible source for dark energy", Monthly Notices of the Royal Astronomical Society: Letters, 2022, 511(1), pp. L82–L86.
"Pressure of Cosmic Voids: A Possible Source for Dark Matter and Dark Energy", arXiv:1907.12418v3.
“Extra-Acceleration at Large Scale due to Merging at Small Scales”, Astro-ph/1709.08612, under review.
• Asymptotic initial vacuum mode for inflation:
“Scale-Dependent Power Spectrum from Initial Excited-de Sitter Modes”, JHEP 09 (2014) 020
• Visualizing the cosmological concepts with simple and natural models:
1- “Visualizing Cosmological Concepts Using the Analog of a Hot Liquid”, Astronomy Education Review, 9, 010201-1, Published by American Astronomical Society (AAS), 2010.
2- “Conceptualization of cosmic expansion using a bottle of drinking water” (in preparation).
Activities
Education and qualifications (2)
Works (30)
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