= Quantum field theory in curved spacetime
{wiki=Quantum_field_theory_in_curved_spacetime}
Quantum Field Theory (QFT) in curved spacetime is the framework that combines the principles of quantum mechanics and quantum field theory with general relativity, which describes the gravitational field in terms of curved spacetime rather than a flat background. This approach is essential for understanding physical phenomena in strong gravitational fields, such as near black holes or during the early moments of the universe just after the Big Bang, where both quantum effects and gravitational effects are significant.
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