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Evaporation of 2-Dimensional Black Holes
Abhay Ashtekar, Frans Pretorius, Fethi M. Ramazanoğlu
We present a detailed analysis of results from a new study of the quantum evaporation of Callan-Giddings-Harvey-Strominger (CGHS) black holes within the mean-field approximation. T…
Path Integrals and the WKB approximation in Loop Quantum Cosmology
Abhay Ashtekar, Miguel Campiglia, Adam Henderson
We follow the Feynman procedure to obtain a path integral formulation of loop quantum cosmology starting from the Hilbert space framework. Quantum geometry effects modify the weigh…
Surprises in the Evaporation of 2-Dimensional Black Holes
Abhay Ashtekar, Frans Pretorius, Fethi M. Ramazanoğlu
Quantum evaporation of Callan-Giddings-Harvey-Strominger (CGHS) black holes is analyzed in the mean field approximation. This semi-classical theory incorporates back reaction. Deta…
The Big Bang and the Quantum
Abhay Ashtekar
This short review is addressed to cosmologists. General relativity predicts that space-time comes to an end and physics comes to a halt at the big-bang. Recent developments in loop…
Casting Loop Quantum Cosmology in the Spin Foam Paradigm
Abhay Ashtekar, Miguel Campiglia, Adam Henderson
The goal of spin foam models is to provide a viable path integral formulation of quantum gravity. Because of background independence, their underlying framework has certain novel f…