Interaction between gravitational waves and domain walls

Details Interaction between gravitational waves and domain walls Interaction between gravitational waves and domain walls

2001-04-04

arxiv.org/abs/gr-qc/0104015v2

Phys.Rev. D64 (2001) 024011

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages

Scientific paper

10.1103/PhysRevD.64.024011

We study the gravitational perturbations of thick domain walls. The refraction index and spin properties of the solutions interior to the wall are analyzed in detail. It is shown that the gravitational waves suffer a refraction process by domain walls. The reflection and transmission coefficients are derived in the thin wall limit. In relation to the spin content, it is shown that the ``$\times$'' helicity 2 gravitational wave mode maintains in the domain wall the same polarization state as in vacuum. On the contrary, the ``+'' mode, of pure helicity 2 in vacuum, is contaminated inside the wall with a spin 0 state, as well as with spin 2, helicity 0 and 1 states.

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