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Zipping and unzipping in string networks: dynamics of Y-junctions

Avgoustidis, Anastasios; Pourtsidou, Alkistis; Sakellariadou, Mairi

Zipping and unzipping in string networks: dynamics of Y-junctions Thumbnail


Alkistis Pourtsidou

Mairi Sakellariadou


We study, within the Nambu-Goto approximation, the stability of massive string junctions under the influence of the tensions of three strings joining together in a Y-type configuration. The relative angle β between the strings at the junction is in general time dependent and its evolution can lead to zipping or unzipping of the three-string configuration. We find that these configurations are stable under deformations of the tension balance condition at the junction. The angle β relaxes at its equilibrium value and the junction grows relativistically. We then discuss other potential “unzipping agents” including monopole/string forces for long strings and curvature for loops, and we investigate specific solutions exhibiting decelerated zipping and unzipping of the Y junction. These results provide motivation for incorporating the effects of realistic string interactions in network evolution models with string junctions.

Journal Article Type Article
Publication Date Jan 15, 2015
Deposit Date Sep 29, 2015
Publicly Available Date Sep 29, 2015
Journal Physical Review D
Print ISSN 2470-0010
Electronic ISSN 1550-7998
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 91
Issue 2
Article Number 025022
Keywords cosmic strings, string theory, string junctions
Public URL
Publisher URL


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