Abstract
We give a generalization of the method of the space-time description of particle creation by a gravitational field for a scalar field with nonconformal coupling to the curvature. The space-time correlation function is obtained for a created pair of the quasi-particles, corresponding to a diagonal form of the instantaneous Hamiltonian. The case of an adiabatic change of the metric of homogeneous isotropic space is analyzed. We show that the created pairs of quasi-particles in de Sitter space should be interpreted as pairs of virtual particles.
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Pavlov, Y.V. Space-time description of scalar particle creation by a homogeneous isotropic gravitational field. Gravit. Cosmol. 14, 314–320 (2008). https://doi.org/10.1134/S020228930804004X
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DOI: https://doi.org/10.1134/S020228930804004X