2004/11/25 by Liao Liu, Liu, Liao
Physics and Astronomy · #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #gr-qc
paper · pdf · doi:10.48550/arxiv.gr-qc/0411122
6 pages
arxiv created 2004/11/25 · arxiv updated 2009/12/01
For there is always a wrong sign in the mass of graviton in the so-called perturbation expansion approximation of both Minkowski and de Sitter spacetimes, the existence of gravitational wave from the metric perturbation of de Sitter spacetime is doubtful. We try another way to start from the assumption that the gravitational wave equation should be both general covariant and conformal invariant and find that graviton is no longer a part of metric field, it has an effective mass of mg=√(R/6)=% √(2Λ/3) with correct sign in de Sitter spacetime, though it's intrinsic mass remains zero.