Dynamic cancellation of a cosmological constant and approach to the Minkowski vacuum

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Karlsruhe Institute of Technology
  • Landau Institute for Theoretical Physics

Abstract

The q-theory approach to the cosmological constant problem is reconsidered. The new observation is that the effective classical q-theory gets modified due to the back-reaction of quantum-mechanical particle production by spacetime curvature. Furthermore, a Planck-scale cosmological constant is added to the potential term of the action density, in order to represent the effects from zero-point energies and phase transitions. The resulting dynamical equations of a spatially-flat Friedmann-Robertson-Walker universe are then found to give a steady approach to the Minkowski vacuum, with attractor behavior for a finite domain of initial boundary conditions on the fields. The approach to the Minkowski vacuum is slow and gives rise to an inflation-type increase of the particle horizon.

Details

Original languageEnglish
Article number1650160
JournalMODERN PHYSICS LETTERS A
Volume31
Issue number28
Publication statusPublished - 14 Sep 2016
MoE publication typeA1 Journal article-refereed

    Research areas

  • cosmological constant, early universe, Quantum field theory in curved spacetime

ID: 7440462