Two-loop scalar self-mass during inflation


Brunier T., Onemli V. K. , WOODARD R.

CLASSICAL AND QUANTUM GRAVITY, cilt.22, ss.59-84, 2005 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 22 Konu: 1
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1088/0264-9381/22/1/005
  • Dergi Adı: CLASSICAL AND QUANTUM GRAVITY
  • Sayfa Sayıları: ss.59-84

Özet

We work in the locally de Sitter background of an inflating universe and consider a massless, minimally coupled scalar with a quartic self-interaction. We use dimensional regularization to compute the fully renormalized scalar self-mass-squared at one- and two-loop order for a state which is released in Bunch-Davies vacuum at t = 0. Although the field strength and coupling constant renormalizations are identical to those of flat space, the geometry induces a non-zero mass renormalization. The finite part also shows a sort of growing mass that competes with the classical force in eventually turning off this system's super-acceleration.