Anomalous Monopole In an Interacting Boson System

Details Anomalous Monopole In an Interacting Boson System Anomalous Monopole In an Interacting Boson System

2008-02-19

arxiv.org/abs/0802.2600v1

Phys. Lett. A375:545, 2011

Physics

Condensed Matter

Other Condensed Matter

4 pages, 3 figures

Scientific paper

Anomalous monopole of disk shape is found to exist in the semiclassical theory of a two-mode interacting boson system. The quantum origin of this anomaly is the collapsing or bundling of field lines of Berry curvature caused by the interaction between bosons in the semiclassical limit. The significance of this anomalous monopole is twofold: (1) it signals the failure of the von Neumann-Wigner theorem in the semiclassical limit; (2) it indicates a breakdown of the correspondence principle between quantum and classical dynamics.

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