Publication Date

2004

Journal or Book Title

PHYSICAL REVIEW LETTERS

Abstract

The standard picture of the loop expansion associates a factor of ¯h with each loop, suggesting that the tree diagrams are to be associated with classical physics, while loop effects are quantum mechanical in nature. We discuss examples wherein classical effects arise from loop contributions and display the relationship between the classical terms and the long range effects of massless particles.

Comments

This is a pre-published version which is collected from arXiv. The published version is at http://prl.aps.org/abstract/PRL/v93/i20/e201602

Volume

93

Pages

-

Issue

20

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