Introduction to superfluidity -- Field-theoretical approach and applications

Abstract

In this pedagogical introduction, I discuss theoretical aspects of superfluidity and superconductivity, mostly using a field-theoretical formalism. While the emphasis is on general concepts and mechanisms behind superfluidity, I also discuss various applications in low-energy and high-energy physics. Besides some introductory and standard topics such as superfluid helium and superfluidity in a simple scalar field theory, the lecture notes also include more advanced chapters, for instance discussions of the covariant two-fluid formalism and Cooper pairing with mismatched Fermi surfaces.

Comments: 150 pages, v2: minor corrections, typos fixed, references added, version published in Lect. Notes Phys. 888, 1-155 (2014), ISBN 978-3-319-07946-2