Astronomy and Astrophysics – Astrophysics – Cosmology and Extragalactic Astrophysics
Scientific paper
2011-10-03
Astronomy and Astrophysics
Astrophysics
Cosmology and Extragalactic Astrophysics
22 pages, 8 figures, Submitted to JCAP
Scientific paper
It has recently been pointed out that the usual procedure employed in order to obtain the transverse-traceless (TT) part of metric perturbations in lattice simulations was inconsistent with the fact that those fields live in the lattice and not in the continuum. It was claimed that this could lead to a larger amplitude and a wrong shape for the gravitational wave (GW) spectra obtained in numerical simulations of (p)reheating. In order to address this issue, we have defined a consistent prescription in the lattice for extracting the TT part of the metric perturbations. We demonstrate explicitly that the GW spectra obtained with the old continuum-based TT projection only differ marginally in amplitude and shape with respect to the new lattice-based ones. We conclude that one can therefore trust the predictions appearing in the literature on the spectra of GW produced during (p)reheating and similar scenarios simulated on a lattice.
Figueroa Daniel G.
Garcia-Bellido Juan
Rajantie Arttu
No associations
LandOfFree
On the Transverse-Traceless Projection in Lattice Simulations of Gravitational Wave Production does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On the Transverse-Traceless Projection in Lattice Simulations of Gravitational Wave Production, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Transverse-Traceless Projection in Lattice Simulations of Gravitational Wave Production will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-271066