Zipping and unzipping in string networks: dynamics of Y-junctions
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 t...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Published: |
American Physical Society
2015
|
| Subjects: | |
| Online Access: | https://eprints.nottingham.ac.uk/29353/ |
| _version_ | 1848793768563572736 |
|---|---|
| author | Avgoustidis, Anastasios Pourtsidou, Alkistis Sakellariadou, Mairi |
| author_facet | Avgoustidis, Anastasios Pourtsidou, Alkistis Sakellariadou, Mairi |
| author_sort | Avgoustidis, Anastasios |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T19:05:33Z |
| format | Article |
| id | nottingham-29353 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:05:33Z |
| publishDate | 2015 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-293532020-05-04T17:00:49Z https://eprints.nottingham.ac.uk/29353/ Zipping and unzipping in string networks: dynamics of Y-junctions Avgoustidis, Anastasios Pourtsidou, Alkistis Sakellariadou, Mairi 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. American Physical Society 2015-01-15 Article PeerReviewed Avgoustidis, Anastasios, Pourtsidou, Alkistis and Sakellariadou, Mairi (2015) Zipping and unzipping in string networks: dynamics of Y-junctions. Physical Review D, 91 (2). 025022/1-025022/20. ISSN 1550-7998 cosmic strings string theory string junctions http://journals.aps.org/prd/abstract/10.1103/PhysRevD.91.025022 doi:10.1103/PhysRevD.91.025022 doi:10.1103/PhysRevD.91.025022 |
| spellingShingle | cosmic strings string theory string junctions Avgoustidis, Anastasios Pourtsidou, Alkistis Sakellariadou, Mairi Zipping and unzipping in string networks: dynamics of Y-junctions |
| title | Zipping and unzipping in string networks: dynamics of Y-junctions |
| title_full | Zipping and unzipping in string networks: dynamics of Y-junctions |
| title_fullStr | Zipping and unzipping in string networks: dynamics of Y-junctions |
| title_full_unstemmed | Zipping and unzipping in string networks: dynamics of Y-junctions |
| title_short | Zipping and unzipping in string networks: dynamics of Y-junctions |
| title_sort | zipping and unzipping in string networks: dynamics of y-junctions |
| topic | cosmic strings string theory string junctions |
| url | https://eprints.nottingham.ac.uk/29353/ https://eprints.nottingham.ac.uk/29353/ https://eprints.nottingham.ac.uk/29353/ |