arxiv5/19/2026, 2:38:13 AM
4D Tensor Singularities and Euler-Class Topology Observed on Superconducting Qubits via Non-Abelian Geometry MeasurementThis paper reports the first theoretical prediction and experimental observation of four-dimensional tensor singularities — point-like monopoles characterized by the Dixmier-Douady class of a real bundle gerbe — and their dimensional reduction into 3D Euler-class descendants, rea…