advanced_notions:quantum_field_theory:qft_curved_spacetime

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advanced_notions:quantum_field_theory:qft_curved_spacetime [2018/05/30 06:18] 89.12.128.15 [Intuitive] |
advanced_notions:quantum_field_theory:qft_curved_spacetime [2018/05/30 06:21] (current) 89.12.128.15 [Intuitive] |
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Since in general relativity the curvature corresponds to the gravitational field, QFT in curved spacetime corresponds to a normal QFT with an external source (=the gravitational field). | Since in general relativity the curvature corresponds to the gravitational field, QFT in curved spacetime corresponds to a normal QFT with an external source (=the gravitational field). | ||

- | For a curvature that depends on the time, we are dealing with a time varying source that can, for example, produce particles. | + | For a curvature that depends on the time, we are dealing with a time varying source that can, for example, produce particles. A proper analogy is a driven harmonic oscillator. |

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- | A proper analogy is a driven harmonic oscillator. | + | |

+ | It is important to note that QFT in curved spacetime is not quantum gravity. In a theory of quantum gravity we would take the backreaction of quantum effects on the spactime into account. In contrast, in curved spacetime QFT the curved spacetime is merely a background structure, i.e. an external source and not treated quantum mechanically. | ||

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advanced_notions/quantum_field_theory/qft_curved_spacetime.txt · Last modified: 2018/05/30 06:21 by 89.12.128.15

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