Kink-antikink scattering in a quantum vacuum

Mainak Mukhopadhyay, Evangelos I. Sfakianakis, Tanmay Vachaspati, George Zahariade

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


We study kink-antikink scattering in the sine-Gordon model in the presence of interactions with an additional scalar field, ψ, that is in its quantum vacuum. In contrast to the classical scattering, now there is quantum radiation of ψ quanta and the kink-antikink may form bound states that resemble breathers of the sine-Gordon model. We quantify the rate of radiation and map the parameters for which bound states are formed. Even these bound states radiate and decay, and eventually there is a transition into long-lived oscillons.

Original languageEnglish (US)
Article number118
JournalJournal of High Energy Physics
Issue number4
StatePublished - Apr 2022


  • Integrable Field Theories
  • Lattice Quantum Field Theory
  • Solitons Monopoles and Instantons
  • Topological Field Theories

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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