Berry phase in quantum field theory: Diabolical points and boundary phenomena

We study aspects of the Berry phase in gapped many-body quantum systems by means of effective field theory. Once the parameters are promoted to space-time-dependent background fields, such adiabatic phases are described by Wess-Zumino-Witten (WZW) and similar terms. In the presence of symmetries, th...

Ausführliche Beschreibung