Author(s)

Arundhati Dasgupta

Department of Physics and Astronomy, University of Lethbridge, Lethbridge, Canada.

Finding the origin of Hawking radiation has been a puzzle to researchers. Using a loop quantum gravity description of a black hole slice, a density matrix is defined using coherent states for space-times with apparent horizons. Evolving the density matrix using a semi-classical Hamiltonian in the frame of an observer outside the horizon gives the origin of Hawking radiation.

Black Hole Physics; Quantum Gravity; Hawking Radiation; Loop Quantum Gravity; Coherent States

Dasgupta, A. (2012) Time Evolution of Horizons. Journal of Modern Physics, 3, 1289-1297. doi: 10.4236/jmp.2012.329166.