Abstract
Consider the Euclidean version of quantum field theory. This had been introduced first by Schwinger [145] and then by Symanzik [163]. Nelson introduced the rigorous version [124]. It follows easily from Wightman’s version that the expectation values of a scalar .eld are analytic in the space-time variables if we continue from the physical region to the region where time is purely imaginary.
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© 2007 Springer
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Streater, R. (2007). Some Good Ideas. In: Lost Causes in and beyond Physics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-36582-2_13
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DOI: https://doi.org/10.1007/978-3-540-36582-2_13
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-36581-5
Online ISBN: 978-3-540-36582-2
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