Conformal-symmetry breaking and cosmological particle creation in λφ4 theory

Details Conformal-symmetry breaking and cosmological particle creation in λφ4 theory Conformal-symmetry breaking and cosmological particle creation in λφ4 theory

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980phrvd..22..322b&link_type=abstract

Physical Review D (Particles and Fields), Volume 22, Issue 2, 15 July 1980, pp.322-329

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26

Scientific paper

We show that creation of field quanta can occur even in conformally trivial situations, contrary to popular belief. This conformal-symmetry breaking owes its existence to the so-called conformal anomaly in the field stress tensor which, in the case of interacting fields in curved spacetime, contains state-dependent, nongeometrical, and other terms which are associated with particle generation. The effect is explicitly demonstrated for massless λφ4 theory in a Robertson-Walker spacetime.

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