Problem of unitarity and quantum corrections in semiclassical quantum gravity
- Department of Physics, Kunsan National University, Kunsan 573-701 (Korea)
Using both the Born-Oppenheimer idea and the de Broglie{endash}Bohm interpretation of a wave function we represent in a different way the semiclassical quantum gravity from the Wheeler-DeWitt equation in an oscillating regime which can preserve completely the unitary quantum evolution of a matter field at the expense of a nonlinear gravitational field equation, but has the same asymptotic limit as the others. We apply the de Broglie{endash}Bohm interpretation to the nonlinear gravitational field equation to develop a perturbation method to find the quantum corrections of a matter field to the gravity. The semiclassical Einstein equation with the quantum corrections is found for a minimal quantum FRW cosmological model. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 530247
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 12 Vol. 55; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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