Time-ordered exponential on the complex plane and Gell-Mann—Low formula as a mathematical theorem
本文檔由 四悉地 分享于2018-11-03 16:41
The time-ordered exponential representation of a complex time evolution operator in the interaction picture is studied. Using the complex time evolution, we prove the Gell-Mann—Low formula under certain abstract conditions, in mathematically rigorous manner. We apply the abstract results to quantum electrodynamics with cutoffs.
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