Structural Properties of Cosmic String Evolution
Date Issued
2010
Date
2010
Author(s)
Huang, Tun-Wei
Abstract
We analyzed the fractal dimension and other structural properties of cosmic strings in a non-expanding universe, using the data of 1024^3 in resolution simulated by Jiun-Huei Porty Wu. The structure of cosmic strings can be characterized by the fractal dimension d, which relates the sectional string length (L) to the distance between the ends of the section (R). We show that the fractal dimension approaches one on small scales and approaches two on large scales. This is consistent with the theory and other studies[1]. We also studied the power spectra, the unequal time correlator (UETC), the long string’s energy density (ρ_∞), and its energy transfer rate to small loops (X_L). We compared our results with those in an expanding universe[5]. We found that they share similar features in power spectra and UETC. We also investigated the relationship between our results and those in an expanding universe[5].
Subjects
Cosmology
Cosmic String
Cosmic Defect
Fractal dimension
Simulation
Type
thesis
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