Infrared propagator corrections for constant deceleration

T. M. Janssen, S. P. Miao, T. Prokopec, R. P. Woodard

研究成果: Article同行評審

61 引文 斯高帕斯(Scopus)

摘要

We derive the propagator for a massless, minimally coupled scalar on a D-dimensional, spatially flat, homogeneous and isotropic background with arbitrary constant deceleration parameter. Our construction uses the operator formalism by integrating the Fourier mode sum. We give special attention to infrared corrections from the nonzero lower limit associated with working on finite spatial sections. These corrections eliminate infrared divergences that would otherwise be incorrectly treated by dimensional regularization, resulting in off-coincidence divergences for those special values of the deceleration parameter at which the infrared divergence is logarithmic. As an application we compute the expectation value of the scalar stress-energy tensor.

原文English
文章編號245013
期刊Classical and Quantum Gravity
25
發行號24
DOIs
出版狀態Published - 2008

All Science Journal Classification (ASJC) codes

  • 物理與天文學(雜項)

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