Time-ordered exponential on the complex plane and Gell-Mann-Low formula as a mathematical theorem
Journal of Mathematical Physics(2016)
摘要
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. Published by AIP Publishing.
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关键词
exponential,gell-mann—low formula,time-ordered
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