The Perfect Hyperfluid of Metric-Affine Gravity: the foundation
نویسندگان
چکیده
We set the foundation and formulate Perfect (Ideal) Hyperfluid. The latter represents natural generalization of usual perfect fluid structure where now microscopic characteristics matter (spin, shear, dilation) are also taken into account, sourcing a non-Riemannian arena (i.e spacetime torsion non-metricity) for Metric-Affine Gravity. derive energy tensors this Hyperfluid subsequently present conservation laws obeyed by them. Finally, we consider Cosmological application classify some possible forms structure.
منابع مشابه
Quadratic metric-affine gravity
We consider spacetime to be a connected real 4-manifold equipped with a Lorentzian metric and an affine connection. The 10 independent components of the (symmetric) metric tensor and the 64 connection coefficients are the unknowns of our theory. We introduce an action which is quadratic in curvature and study the resulting system of Euler–Lagrange equations. In the first part of the paper we lo...
متن کاملTwo-dimensional metric-affine gravity
There is a number of completely integrable gravity theories in two dimensions. We study the metric-affine approach on a 2-dimensional spacetime and display a new integrable model. Its properties are described and compared with the known results of Poincaré gauge gravity. PACS: 04.50.+h, 04.20.Fy, 04.20.Jb, 04.60.Kz, 02.30.Ik
متن کاملString and Metric–Affine Gravity
We develop the method of anholonomic frames with associated nonlinear connec-tion (in brief, N–connection) structure and show explicitly how geometries with lo-cal anisotropy (various type of Finsler–Lagrange–Cartan–Hamilton geometry) can bemodeled in the metric–affine spaces. There are formulated the criteria when such gen-eralized Finsler metrics are effectively induced in the...
متن کاملBRST–Antifield–Treatment of Metric–Affine Gravity
The metric–affine gauge theory of gravity provides a broad framework in which gauge theories of gravity can be formulated. In this article we fit metric–affine gravity into the covariant BRST–antifield formalism in order to obtain gauge fixed quantum actions. As an example the gauge fixing of a general two–dimensional model of metric–affine gravity is worked out explicitly. The result is shown ...
متن کاملMetric-affine f(R) theories of gravity
General Relativity assumes that spacetime is fully described by the metric alone. An alternative is the so called Palatini formalism where the metric and the connections are taken as independent quantities. The metric-affine theory of gravity has attracted considerable attention recently, since it was shown that within this framework some cosmological models, based on some generalized gravitati...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2021
ISSN: ['1475-7516', '1475-7508']
DOI: https://doi.org/10.1088/1475-7516/2021/04/072