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Quantum Fields in Curved Space N. D. Birrell, P. C. W. Davies
Publisher: Cambridge University Press

Since there is no complete quantum theory of gravity, they used an established approach called quantum field theory in curved spacetime (QFTCS). Matthews, and Nobel laureate Frank Wilczek, who have created scientific models where the Big Bang and thus the entire universe could arise from nothing but a random quantum vacuum fluctuation in the quantum field -- via natural processes. In 1997, Juan Maldacena made the startling conjecture that theories of gravity on curved spaces are equivalent to ordinary quantum field theories confined to the boundaries of those spaces. Wald, Quantum Field Theory in Curved Spacetime and Black Hole Thermodynamics, University of Chicago Press 1994; The back reaction effect in particle creation in curved spacetime, Commun. Topics discussed here include: a comparison with Euclidean quantum field theory, supersymmetry and general relativity. And have studied quantum information transmission in the presence of a black hole. Davies: Quantum Fields in Curved Space (Cambridge University Press, New York, 1986) Chap. The researchers applied loop quantum gravity theory to the simplest model of Pullin emphasized that they used a very simple model in this study, consisting of only highly curved spacetime without representing the actual matter found inside real black holes. Michio Kaku, Alan Guth, Alex Vilenkin, Robert A.J. All objects move without additional external force along a straight line in curved spacetime and the geometry of the spacetime is dictated by the present mass/energy" . Gravitation: the medium of exchange is the metric of space-time itself. In loop quantum gravity, the four dimensions of spacetime are composed of networks of intersecting loops — ripples of the gravitational field. As an addendum, it is also interesting to note that Hawking radiation is a direct consequence of quantum field theory in curved space-time. Gravitons are virtual excitations of the curvature of space-time, treated as a quantum mechanical field.