Universal Relation among Many-Body Chern Number, Rotation Symmetry, and Filling

Abstract

Understanding the interplay between the topological nature and the symmetry property of interacting systems has been a central matter of condensed matter physics in recent years. In this Letter, we establish nonperturbative constraints on the quantized Hall conductance of many-body systems with arbitrary interactions. Our results allow one to readily determine the many-body Chern number modulo a certain integer without performing any integrations, solely based on the rotation eigenvalues and the average particle density of the many-body ground state.

5+13 pages, 3+6 figures; v3: minor edits, to appear in Physical Review Letters