Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5494499 | Nuclear Physics B | 2017 | 40 Pages |
Abstract
We study the winding number susceptibility ãI2ã in a superfluid system and the topological susceptibility ãQ2ã in QCD. We argue that both correlation functions exhibit similar structures, including the generation of the contact terms. We discuss the nature of the contact term in superfluid system and argue that it has exactly the same origin as in QCD, and it is related to the long distance physics which cannot be associated with conventional microscopical degrees of freedom such as phonons and rotons. We emphasize that the conceptual similarities between superfluid system and QCD may lead, hopefully, to a deeper understanding of the topological features of a superfluid system as well as the QCD vacuum.
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematical Physics
Authors
Ariel Zhitnitsky,