TY - JOUR
T1 - Conformal-symmetry breaking and cosmological particle creation in 4 theory
AU - Birrell, N. D.
AU - Davies, P. C.W.
PY - 1980
Y1 - 1980
N2 - 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 4 theory in a Robertson-Walker spacetime.
AB - 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 4 theory in a Robertson-Walker spacetime.
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U2 - 10.1103/PhysRevD.22.322
DO - 10.1103/PhysRevD.22.322
M3 - Article
AN - SCOPUS:0004416887
SN - 1550-7998
VL - 22
SP - 322
EP - 329
JO - Physical review D: Particles and fields
JF - Physical review D: Particles and fields
IS - 2
ER -