3 papers
gr-qc2019
Parity violating Friedmann Universes
João Magueijo, Tom Złośnik
We revisit models, within the Einstein-Cartan theory, where the cosmological constant is promoted to a variable, at the cost of allowing for torsion even in the absence of spin…
gr-qc2019
The General Linear Cartan Khronon
Tomi Koivisto, Manuel Hohmann, Tom Złośnik
A Cartan geometry of the General Linear symmetry is formulated by dividing out the displacements from the group. The resulting action is quadratic in curvature, polynomial in all t…
gr-qc2018
Spacetime and dark matter from spontaneous breaking of Lorentz symmetry
Tom Złośnik, Federico Urban, Luca Marzola +1
It is shown that a spontaneously-broken gauge theory of the Lorentz group contains Ashtekar's chiral formulation of General Relativity accompanied by dust. From this perspective, g…