Within loop quantum gravity we construct a coarse-grained approximation for the Einstein-
Maxwell theory that yields effective Maxwell equations in flat spacetime comprising Planck …

Quantum gravity phenomenology opens up the possibility of probing Planck scale physics.
Thus, by exploiting the generic properties that a semiclassical state of the compound system …

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 …

Scalar cosmological perturbations in loop quantum cosmology (LQC) is revisited in a
covariant manner, using self dual Ashtekar variables. For real-valued Ashtekar-Barbero …

The canonical analysis of the (anti-) self-dual action for gravity supplemented with the (anti-)
self-dual Pontrjagin term is carried out. The effect of the topological term is to add …

We study the limit of the Lorentz-covariant canonical formulation where the Immirzi
parameter approaches β= i. We show that, formulated in terms of a shifted spacetime …

A bstract We study the internally abelianized version of a range of gravitational theories,
written in connection tetrad form, and study the possible interaction terms that can be added …

Using a purely imaginary translational Chern-Simons term as a generating function, a chiral
reformulation of gravity à la Ashtekar is achieved. It is a crucial advantage of our Clifford …

Similarly as in the Ashtekar approach, the translational Chern‐Simons term is, as a
generating function, instrumental for a chiral reformulation of simple supergravity. After …

We study the deformation quantisation (Moyal quantisation) of general constrained
Hamiltonian systems. It is shown how second class constraints can be turned into first class …