Global strings and superfluid vortices: Analogies and differences

Ben Ami Gradwohl*, German Kälbermann, Tsvi Piran, Edmund Bertschinger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Following a brief derivation of the Kalb-Ramond action from an abelian Higgs model, we analyze the dynamics of global strings. We explicitly show that the strings is immersed in its Goldstone boson background field and not in vacuum. This then leads to a configuration dependent Lorentz-like force which opposes the tension. Nevertheless, the resultant force is dominated by the tension and the global string is shown to behave similarly to a Nambu string. This result is confirmed by the dispersion law of small excitations around an axisymmetric string in a U(1) field theory. We elaborate on the similarities and differences between global strings and superfluid vortices.

Original languageEnglish
Pages (from-to)371-385
Number of pages15
JournalNuclear Physics B
Volume338
Issue number2
DOIs
StatePublished - 9 Jul 1990

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