2005/12/31 by V. Mukhanov, V Mukhanov, A. Vikman +1 · 7 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmic microwave background #Cosmological perturbation theory #Cosmology and Gravitation Theories #Gravitational wave #Inflation (cosmology) #Kinetic energy #Kinetic term #Perturbation (astronomy) #Pulsars and Gravitational Waves Research #Simple (philosophy) #astro-ph #gr-qc #hep-th
paper · pdf · doi:10.1088/1475-7516/2006/02/004
published as JCAP 0602:004,2006 · 9 pages, 1 figure and references are added, discussion is slightly extended, published version
openalex publication_date 2006/02/08 · arxiv created 2006/02/24 · arxiv updated 2014/10/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show that in theories with a nontrivial kinetic term the contribution of the gravitational waves to the cosmic microwave background (CMB) fluctuations can be substantially larger than that naively expected from simple inflationary models. This increase of the tensor-to-scalar perturbation ratio leads to a larger B mode component of the CMB polarization, thus making the prospects for future detection much more promising. The other important consequence of the model considered is a higher energy scale of inflation and hence higher reheating temperature compared to a simple inflation case.