An attempt is made to go beyond the semiclassical approximation for gravity in the Born-Oppenheimer decomposition of the wave-function in minisuperspace. New terms are included which correspond to quantum gravitational fluctuations on the background metric. They induce a back-reaction on the semiclassical background and can lead to the avoidance of the singularities the classical theory predicts in cosmology and in the gravitational collapse of compact objects.
On gravitational fluctuations and the semiclassical limit in minisuperspace models / Casadio R.. - In: INTERNATIONAL JOURNAL OF MODERN PHYSICS D. - ISSN 0218-2718. - STAMPA. - 9:5(1999), pp. 511-529. [10.1142/s0218271800000517]
On gravitational fluctuations and the semiclassical limit in minisuperspace models
Casadio R.
1999
Abstract
An attempt is made to go beyond the semiclassical approximation for gravity in the Born-Oppenheimer decomposition of the wave-function in minisuperspace. New terms are included which correspond to quantum gravitational fluctuations on the background metric. They induce a back-reaction on the semiclassical background and can lead to the avoidance of the singularities the classical theory predicts in cosmology and in the gravitational collapse of compact objects.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
