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Motion of a "small body" in non-metric gravity
Kirill Krasnov
We describe "small bodies" in a non-metric gravity theory previously studied by this author. The main dynamical field of the theory is a certain triple of two-forms rather than the…
Plebanski gravity without the simplicity constraints
Kirill Krasnov
In Plebanski's self-dual formulation general relativity becomes SO(3) BF theory supplemented with the so-called simplicity (or metricity) constraints for the B-field. The main dyna…
Remarks on Barbero-Immirzi parameter as a field
Alexander Torres-Gomez, Kirill Krasnov
We revisit a propagating torsion gravity theory obtained by introducing a field coupled to the Holst term in the first-order Einstein-Cartan action. The resulting theory has second…
Hamiltonian Analysis of non-chiral Plebanski Theory and its Generalizations
Sergei Alexandrov, Kirill Krasnov
We consider non-chiral, full Lorentz group-based Plebanski formulation of general relativity in its version that utilizes the Lagrange multiplier field Phi with "internal" indices.…
A symplectic map between hyperbolic and complex Teichmüller theory
Kirill Krasnov, Jean-Marc Schlenker
Let be a closed, orientable surface of genus at least 2. The cotangent bundle of the "hyperbolic'' Teichmüller space of can be identified with the space $\CP$ of complex pr…
Halos of Modified Gravity
Kirill Krasnov, Yuri Shtanov
We describe how a certain simple modification of general relativity, in which the local cosmological constant is allowed to depend on the space-time curvature, predicts the existen…