Cosmology of quadratic metric-affine gravity
نویسندگان
چکیده
We investigate the cosmological aspects of most general parity preserving Metric-Affine Gravity theory quadratic in torsion and non-metricity presence a hyperfluid. The equations motion are obtained by varying action with respect to metric independent affine connection. Subsequently, considering Friedmann-Lema\^itre-Robertson-Walker background, we derive form modified Friedmann for full theory. then focus on characteristic sub-case involving only two contributions given terms vectors. In this setup, studying along conservation laws perfect hyperfluid, provide exact solutions both purely dilation spin hypermomentum sources. discuss physical consequences our model prominent role setup.
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ژورنال
عنوان ژورنال: Physical review
سال: 2022
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.105.024007