Dirac Fields in Loop Quantum Gravity and Big Bang Nucleosynthesis

Oct, 2007
15 pages
Published in:
  • Phys.Rev.D 77 (2008) 084003
e-Print:
Report number:
  • IGC-07-10-5

Citations per year

20072010201320162019012345
Abstract: (arXiv)
Big Bang nucleosynthesis requires a fine balance between equations of state for photons and relativistic fermions. Several corrections to equation of state parameters arise from classical and quantum physics, which are derived here from a canonical perspective. In particular, loop quantum gravity allows one to compute quantum gravity corrections for Maxwell and Dirac fields. Although the classical actions are very different, quantum corrections to the equation of state are remarkably similar. To lowest order, these corrections take the form of an overall expansion-dependent multiplicative factor in the total density. We use these results, along with the predictions of Big Bang nucleosynthesis, to place bounds on these corrections.
  • 98.80.Ft
  • 04.60.Pp
  • 04.20.Fy
  • quantum gravity: loop space
  • Dirac equation
  • cosmological model
  • nucleosynthesis: big bang
  • equation of state: correction
  • Maxwell equation
  • numerical calculations
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