On the coupling between spinning particles and cosmological gravitational waves

Irene Milillo, Massimiliano Lattanzi, Giovanni Montani

Research output: Contribution to journalArticle


The influence of spin in a system of classical particles on the propagation of gravitational waves is analyzed in the cosmological context of primordial thermal equilibrium. On a flat Friedmann-Robertson-Walker metric, when the precession is neglected, there is no contribution due to the spin to the distribution function of the particles. Adding a small tensor perturbation to the background metric, we study if a coupling between gravitational waves and spin exists that can modify the evolution of the distribution function, leading to new terms in the anisotropic stress, and then to a new source for gravitational waves. In the chosen gauge, the final result is that, in the absence of other kind of perturbations, there is no coupling between spin and gravitational waves. © 2008 World Scientific Publishing Company.
Original languageEnglish
Pages (from-to)1278 - 1281
Number of pages4
JournalInternational Journal of Modern Physics A
Issue number8
Publication statusPublished - 30 Mar 2008
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Mathematical Physics
  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this