Abstract
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 language | English (US) |
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Pages (from-to) | 565-577 |
Number of pages | 13 |
Journal | Journal of High Energy Physics |
Volume | 8 |
Issue number | 7 |
DOIs | |
State | Published - Jul 1 2004 |
Externally published | Yes |
Keywords
- Bosonic Strings
- Cosmology of Theories beyond the SM
- Space-Time Symmetries
ASJC Scopus subject areas
- Nuclear and High Energy Physics