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5 papers · 2 filters
BTZ Black Hole Entropy and the Turaev-Viro model
Marc Geiller, Karim Noui
We show the explicit agreement between the derivation of the Bekenstein-Hawking entropy of a Euclidean BTZ black hole from the point of view of spin foam models and canonical quant…
Dressing a black hole with a time-dependent Galileon
Eugeny Babichev, Christos Charmousis
We present a class of exact scalar-tensor black holes for a shift-symmetric part of the Horndeski action. The action includes a higher order scalar tensor interaction term. We find…
Collision of Shock Waves in Einstein-Maxwell Theory with a Cosmological Constant: A Special Solution
C. Barrabès, P. A. Hogan
Post-collision space-times of the Cartesian product form M'xM'', where M' and M'' are two-dimensional manifolds, are known with M' and M'' having constant curvatures of equal and o…
Spectra of geometric operators in three-dimensional LQG: From discrete to continuous
Jibril Ben Achour, Marc Geiller, Karim Noui +1
We study and compare the spectra of geometric operators (length and area) in the quantum kinematics of two formulations of three-dimensional Lorentzian loop quantum gravity. In the…
Testing the role of the Barbero-Immirzi parameter and the choice of connection in Loop Quantum Gravity
Jibril Ben Achour, Marc Geiller, Karim Noui +1
We study the role of the Barbero-Immirzi parameter and the choice of connection in the construction of (a symmetry-reduced version of) loop quantum gravity. We start with the f…