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Dynamics of stringy congruence in the early universe

Title
Dynamics of stringy congruence in the early universe
Authors
Cho Y.S.Hong S.-T.
Ewha Authors
조용승홍순태
SCOPUS Author ID
조용승scopus; 홍순태scopus
Issue Date
2011
Journal Title
Physical Review D - Particles, Fields, Gravitation and Cosmology
ISSN
1550-7998JCR Link
Citation
vol. 83, no. 10
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We study twist and shear aspects of the stingy geodesic surface congruence. Under some natural conditions we derive the equations of the twist and shear in terms of the expansion of the Universe. We observe in this higher dimensional cosmology that, as the early universe evolves with expansion rate, the twist of the stringy congruence decreases exponentially and the initial twist value should be large enough to sustain the rotations of the ensuing universe, while the effects of the shear are negligible to produce the isotropic and homogeneous universe. We also investigate the twist and shear of the geodesic surface congruence of the null strings. © 2011 American Physical Society.
DOI
10.1103/PhysRevD.83.104040
Appears in Collections:
자연과학대학 > 수학전공 > Journal papers
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