Talk detail

Participant	Liu, Xin
Institution	Beijing-Dublin International College, Beijing University of Technology - Pingleyuan 100 - Beijing - Beijing - China

Session	CS1	Accepted	Yes	Order	8	Time	17:55	20'
Talk	Oral abstract	Title	Tackling cosmic strings by knot polynomials
Coauthors	Li, Xinfei; Huang Yong-chang
Abstract	Cosmic strings in the early universe have received revived interest in recent years. In this work we derive these structures as topological defects from singular distributions of the quintessence field of dark energy. Emphasis is placed on the topological charge of tangled cosmic strings, which originates from the Hopf mapping degree and is a Chern-Simons type action possessing strong inherent tie to knot topology. It is shown that the knot polynomials (including Kauffman bracket, Jones & HOMFLYPT) can be constructed in terms of this charge, serving as a topological invariant much stronger than the traditional Gauss linking numbers in characterizing string topology. This method induces applications in two aspects. One is to search a tool to measure the cascade of descreasing topological complexity and that of descreasing energy/entropy. The other is arousing a promising mathematical approach for the study of physical breaking-reconnection processes of tangled cosmic strings.
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