Constructive φ⁴ field theory without tears
classification
🧮 math-ph
math.MP
keywords
theoryclusterconstructiveconstructivelyeuclideanexpansionexpansionsfield
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We propose to treat the $\phi^4$ Euclidean theory constructively in a simpler way. Our method, based on a new kind of "loop vertex expansion", no longer requires the painful intermediate tool of cluster and Mayer expansions.
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