scholarly journals TENSORIAL STRUCTURE OF THE LQG GRAVITON PROPAGATOR

2008 ◽  
Vol 23 (08) ◽  
pp. 1209-1213 ◽  
Author(s):  
EMANUELE ALESCI
Keyword(s):  
Asymptotic Behavior ◽  
Quantum Gravity ◽  
Loop Quantum Gravity ◽  
Long Distance ◽  
Graviton Propagator ◽  
Distance Limit

We review the construction of the tensorial structure of the graviton propagator in the context of loop quantum gravity and spinfoam formalism. The main result of this analysis is that applying the same strategy used to compute the diagonal terms, the Barrett-Crane vertex is unable to yield the correct propagator in the long distance limit. The problem is in the intertwiner-independence of the Barrett-Crane vertex. We also review the asymptotic behavior of an alternative vertex that is able to give the correct propagator.

scholarly journals Graviton propagator in loop quantum gravity

2006 ◽  
Vol 23 (23) ◽  
pp. 6989-7028 ◽  
Author(s):  
Eugenio Bianchi ◽  
Leonardo Modesto ◽  
Carlo Rovelli ◽  
Simone Speziale
Keyword(s):  
Quantum Gravity ◽  
Loop Quantum Gravity ◽  
Graviton Propagator

scholarly journals Review on hermiticity of the volume operators in Loop Quantum Gravity

2019 ◽  
Vol 51 (5) ◽  
Author(s):  
S. Ariwahjoedi ◽  
I. Husin ◽  
I. Sebastian ◽  
F. P. Zen
Keyword(s):  
Quantum Gravity ◽  
Loop Quantum Gravity

scholarly journals Quantum gravity: A brief history of ideas and some prospects

2015 ◽  
Vol 24 (11) ◽  
pp. 1530028 ◽  
Author(s):  
Steven Carlip ◽  
Dah-Wei Chiou ◽  
Wei-Tou Ni ◽  
Richard Woodard
Keyword(s):  
Black Hole ◽  
String Theory ◽  
Quantum Gravity ◽  
Loop Quantum Gravity ◽  
Black Hole Thermodynamics ◽  
History Of Ideas ◽  
Foreseeable Future ◽  
Gravitational Effects ◽  
History Of

We present a bird's-eye survey on the development of fundamental ideas of quantum gravity, placing emphasis on perturbative approaches, string theory, loop quantum gravity (LQG) and black hole thermodynamics. The early ideas at the dawn of quantum gravity as well as the possible observations of quantum gravitational effects in the foreseeable future are also briefly discussed.

scholarly journals The length operator in Loop Quantum Gravity

2009 ◽  
Vol 807 (3) ◽  
pp. 591-624 ◽  
Author(s):  
Eugenio Bianchi
Keyword(s):  
Quantum Gravity ◽  
Loop Quantum Gravity

scholarly journals U(N) coherent states for loop quantum gravity

2011 ◽  
Vol 52 (5) ◽  
pp. 052502 ◽  
Author(s):  
Laurent Freidel ◽  
Etera R. Livine
Keyword(s):  
Quantum Gravity ◽  
Coherent States ◽  
Loop Quantum Gravity

scholarly journals Black Hole Interior from Loop Quantum Gravity

2008 ◽  
Vol 2008 ◽  
pp. 1-12 ◽  
Author(s):  
Leonardo Modesto
Keyword(s):  
Black Hole ◽  
Quantum Gravity ◽  
Event Horizon ◽  
Loop Quantum Gravity ◽  
Planck Scale ◽  
Semiclassical Analysis ◽  
Schwarzschild Solution ◽  
Quantum Black Hole ◽  
Minimum Value ◽  
Black Hole Interior

We calculate modifications to the Schwarzschild solution by using a semiclassical analysis of loop quantum black hole. We obtain a metric inside the event horizon that coincides with the Schwarzschild solution near the horizon but that is substantially different at the Planck scale. In particular, we obtain a bounce of theS2sphere for a minimum value of the radius and that it is possible to have another event horizon close to ther=0point.

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