A first-quantized formalism for cosmological particle production

Alex Hamilton, Daniel Kabat, Maulik Parikh

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


Given suitable boundary conditions, we show that the initial state and the amount of particle production in a cosmological spacetime are encoded in the Feynman propagator. The propagator can be represented in terms of a particle path integral in an auxiliary spacetime, and particle production can be extracted from the auxiliary propagator. This provides a first-quantized formalism for computing cosmological particle production which, unlike conventional Bogolubov transformations, may be amenable to a string-theoretic generalization.

Original languageEnglish (US)
Pages (from-to)565-577
Number of pages13
JournalJournal of High Energy Physics
Issue number7
StatePublished - Jul 1 2004
Externally publishedYes


  • Bosonic Strings
  • Cosmology of Theories beyond the SM
  • Space-Time Symmetries

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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