Anisotropic particle creation from $T-$vacuum in the radiation dominated universe

• URL: http://arxiv.org/abs/2312.17129v1
• Date: Thu, 28 Dec 2023 17:05:56 GMT
• Title: Anisotropic particle creation from $T-$vacuum in the radiation dominated universe
• Authors: Dhamar S. Astilla, Sujoy K. Modak and Enrique Salazar
• Abstract summary: We extend the previous work to a realistic (3+1) dimensional set up and show that $T-$vacuum causes an emphanisotropic particle creation in the early universe. Unlike the Hawking or Unruh effect, where the particle content is thermal and radiationally defined, here it is non-thermal and time dependent.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We further investigate novel features of the $T-$vacuum state, originally defined in the context of quantum field theory in a (1+1) dimensional radiation dominated universe [Modak, JHEP 12, 031 (2020)]. Here we extend the previous work to a realistic (3+1) dimensional set up and show that $T-$vacuum causes an \emph{anisotropic particle creation} in the radiation dominated early universe. Unlike the Hawking or Unruh effect, where the particle content is thermal and asymptotically defined, here it is non-thermal and time dependent. This novel example of particle creation is interesting because these particles are detected in the frame of physical/cosmological observers, who envision the $T-$vacuum as a particle excited state, and therefore may eventually be compared with observations.

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