Classical-quantum correspondence for fields

Tanmay Vachaspati, George Zahariade

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


We map the quantum problem of a free bosonic field in a space-time dependent background into a classical problem. N degrees of freedom of a real field in the quantum theory are mapped into 2N2 classical simple harmonic oscillators with specific initial conditions. We discuss how this classical-quantum correspondence (CQC) may be used to evaluate quantum radiation and fully treat the backreaction of quantum fields on classical backgrounds. The technique has widespread application, including to the quantum evaporation of classical breathers ("oscillons").

Original languageEnglish (US)
Article number015
JournalJournal of Cosmology and Astroparticle Physics
Issue number9
StatePublished - Sep 4 2019


  • ination
  • physics of the early universe
  • quantum field theory on curved space

ASJC Scopus subject areas

  • Astronomy and Astrophysics


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