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- W3016823488 abstract "A bstract We report the existence of an Unruh like effect, for physical observers (cosmo- logical and comoving observers) in the radiation dominated early universe, which is possible due to the discovery of a new vacuum state (referred here as the T− vacuum). Both the comoving and the cosmological observers, who are crucial in our understanding of cosmology, observe this T− vacuum as a particle excited state and are able to detect radiation due to particle creation. We draw a robust analogy with the Unruh effect, whereby — (i) the physical observers here are closely analogous to the accelerated (Rindler) observers in the flat spacetime, and (ii) the T− vacuum plays the role of the Minkowski vacuum state which contains particles when viewed from the physical observers frame. Our analogy is further supported by a proof of well-defined (hadamard) behavior of the T− vacuum in the entire spacetime. All our analysis of the particle creation process is done here within a two dimensional set up." @default.
- W3016823488 created "2020-04-24" @default.
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- W3016823488 date "2020-12-01" @default.
- W3016823488 modified "2023-10-16" @default.
- W3016823488 title "Physical observers, T-vacuum and Unruh like effect in the radiation dominated early universe" @default.
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- W3016823488 doi "https://doi.org/10.1007/jhep12(2020)031" @default.
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