Conformal Symmetry Breaking and Cosmological Particle Creation in $\lambda \phi^4$ Theory - INSPIRE

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Conformal Symmetry Breaking and Cosmological Particle Creation in $\lambda \phi^4$ Theory

Aug, 1979

25 pages

Published in:

Phys.Rev.D 22 (1980) 322

DOI:

10.1103/PhysRevD.22.322

Report number:

Print-79-0645 (KING'S COLL.)

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Abstract: (APS)

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.

FIELD THEORY: SPACE-TIME
general relativity
field theory: scalar
PARTICLE: PRODUCTION
PRODUCTION: PARTICLE
INVARIANCE: CONFORMAL
SYMMETRY BREAKING
RENORMALIZATION: REGULARIZATION
FIELD THEORY: VACUUM STATE
ASTROPHYSICS

References(8)

Figures(0)

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