Abstract
In this chapter we will explore how unitarity, the requirement that probability be conserved in quantum time evolution, interacts with the perturbation expansion.
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Quod est inferius est sicut quod est superius, et quod est superius est sicut quod est inferius, ad perpetranda miracula rei unius. (Hermes Trismegistus, The Emerald Tablet.)
Julian Seymour Schwinger. Born Feb. 12, 1918, New York, NY. Died July 16, 1994, Los Angeles, CA, Nobel Prize in Physics 1968.
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© 2000 Springer Science+Business Media New York
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Stone, M. (2000). Loops, Unitarity, and Analyticity. In: The Physics of Quantum Fields. Graduate Texts in Contemporary Physics. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-0507-4_5
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DOI: https://doi.org/10.1007/978-1-4612-0507-4_5
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4612-6794-2
Online ISBN: 978-1-4612-0507-4
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