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Related Experiment Videos

Formation of vortex loops (strings) in continuous phase transitions.

Mark J Bowick1, Angelo Cacciuto, Alex Travesset

  • 1Physics Department, Syracuse University, Syracuse, New York 13244-1130, USA. bowick@physics.syr.edu

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|February 28, 2002
PubMed
Summary

Cosmic string formation is suppressed by domain interactions in a 3D O(2) model. This defect production is sensitive to the quench rate, impacting early universe cosmology.

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Area of Science:

  • Cosmology
  • High Energy Physics
  • Computational Physics

Background:

  • Cosmic strings are theoretical topological defects potentially formed in the early universe.
  • Understanding defect formation is crucial for cosmological models and understanding phase transitions.

Purpose of the Study:

  • To numerically analyze the formation of vortex loops (global cosmic strings) in a 3D O(2) linear sigma model.
  • To investigate the impact of Langevin dynamics and domain interactions on defect production.

Main Methods:

  • Numerical simulations of the O(2) linear sigma model in three spatial dimensions.
  • Analysis of over-damped Langevin dynamics to model defect formation.
  • Investigation of the role of correlated domains and phase variation.

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Main Results:

  • Defect production (vortex loop formation) is suppressed by interactions between correlated domains.
  • This suppression reduces the effective spatial variation of the order field's phase.
  • The degree of suppression is sensitive to the quench rate.

Conclusions:

  • Interactions between domains play a significant role in suppressing cosmic string formation.
  • The quench rate is a critical parameter influencing the extent of this suppression.
  • Numerical methods provide valuable insights into defect formation mechanisms in cosmological models.