62 citations · 350 across the 22 of their papers we have counts for
3 papers · 1 filter
Volume elements of spacetime and a quartet of scalar fields
Frank Gronwald, Uwe Muench, Alfredo Macías +1
Starting with a `bare' 4-dimensional differential manifold as a model of spacetime, we discuss the options one has for defining a volume element which can be used for physical theo…
Colliding waves in metric-affine gravity
Alberto García, Claus Lämmerzahl, Alfredo Macías +2
We generalize the formulation of the colliding gravitational waves to metric-affine theories and present an example of such kind of exact solutions. The plane waves are equipped wi…
Supersymmetric quantum cosmology for Bianchi class A models
Alfredo Macías, Eckehard W. Mielke, José Socorro
The canonical theory of (N=1) supergravity, with a matrix representation for the gravitino covector-spinor, is applied to the Bianchi class A spatially homogeneous cosmologies. The…