Abstract
We started our discussion in Sect. 1.1 with the amplitude for the process \(\mathcal{A}=\mathcal{D}(x_2)\mathcal{G}(x_2;x_1)\mathcal{C}(x_1) \) involving creation, propagation and detection (usually accompanied by destruction) of a particle and concentrated on the middle part \(\mathcal{G}(x_2;x_1)\).
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© 2016 Springer International Publishing Switzerland
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Padmanabhan, T. (2016). Disturbing the Vacuum. In: Quantum Field Theory. Graduate Texts in Physics. Springer, Cham. https://doi.org/10.1007/978-3-319-28173-5_2
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DOI: https://doi.org/10.1007/978-3-319-28173-5_2
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