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- W4309205721 abstract "In this paper, we investigate the existence of bulk viscous FLRW cosmological models in a recently proposed extended symmetric teleparallel gravity or $fleft( Q,Tright) $ gravity in which $Q$ is the non-metricity and $T$ is the trace of the energy-momentum tensor. We consider a simple coupling between matter and non-metricity, specifically, $fleft( Q,Tright) =alpha Q^{m+1}+lambda T$ and $fleft( Q,Tright) =alpha Q+lambda T$ where $alpha $, $lambda $ and $m$ are free model parameters. The exact cosmological solutions are found by assuming the scale factor in the form of the hybrid expansion law. This type of relation generates a time-varying deceleration parameter with the transition of the Universe from the early decelerating phase to the present accelerating phase. In the presence of viscous fluid, we analyze some cosmological parameters of our cosmological model such as the energy density, bulk viscous pressure, bulk viscous coefficient, equation of state parameter, and energy conditions. Finally, we conclude our $fleft( Q,Tright) $ cosmological models agree with the recent astronomical observations." @default.
- W4309205721 created "2022-11-24" @default.
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- W4309205721 date "2022-11-15" @default.
- W4309205721 modified "2023-09-27" @default.
- W4309205721 title "Bulk viscous fluid in extended symmetric teleparallel gravity" @default.
- W4309205721 doi "https://doi.org/10.48550/arxiv.2211.07991" @default.
- W4309205721 hasPublicationYear "2022" @default.
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