Hawking temperature and fluctuations of a scalar field in a de Sitter space
Rozhanskii L V.
The diffusion equation for fluctuations of a scalar field in a de Sitter space is shown to correspond to the Hawking temperature. The relationship between the steady-state solution of this equation and a Hartle-Hawking instanton is established for a space of arbitrary dimensionality and for an arbitrary type of gravitational action.