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      Gravitational waves in preheating

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          Abstract

          We study the evolution of gravitational waves through the preheating era that follows inflation. The oscillating inflaton drives parametric resonant growth of scalar field fluctuations, and although super-Hubble tensor modes are not strongly amplified, they do carry an imprint of preheating. This is clearly seen in the Weyl tensor, which provides a covariant description of gravitational waves.

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          Journal
          10.1088/0264-9381/17/15/303
          gr-qc/0002089

          General relativity & Quantum cosmology,General astrophysics,High energy & Particle physics

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