arXiv subjects

Claudio Aravena-Plaza

Publications and source records attributed to Claudio Aravena-Plaza.

2 recordsLinked to original sources

arXiv2024

Accelerating Airy tensor modes of cosmological gravitational waves

From a classical analysis, it is shown that the nondiffractive accelerating gravitational Airy wave packets are solutions of Einstein equations for their linearized tensor modes in a Friedmann-Lemaître-Robertson-Walker cosmological background filled with a perfect fluid, with equations of state $w=1/3$ and $w=-1/3$. These solutions have finite energy, presenting accelerating behavior due to the structured spatial form of the wavepacket. This is manifested by curved trajectories along the wave path. Also, using spectral functions, it is possible, with these packets, to construct more general, arbitrary wave packets. All these new solutions bring insights on new forms for gravitational wave propagation.

gr-qc↗

arXiv2023

London-like tensor modes of gravitational waves in cosmic string cosmology

From a classical analysis, we show that gravitational waves in a cosmological medium with equation of state $ω=-1/3$ can follow a London-like equation, implying that some gravitational wave solutions present a decay for certain wavelengths. This scenario, corresponding to a cosmic string cosmology, induces an attenuation temporal scale on the gravitational wave propagation. We discuss on how these solutions impose a limit on the wavelength of the waves that can propagate, which depends on the type of spatial curvature and the energy density content of this type of cosmology.

gr-qc↗