Abstract
We study mixed anomaly between G₁ and G₂ of one-form finite symmetry G₁× G₂ in 3d Chern-Simons theories. We assign a quantum entanglement structure to two linked G-symmetry lines (Wilson loops) and compute the entanglement entropy S[G]. We find a measure of the mixed anomaly by computing S[G₁× G₂]-S[G₁]-S[G₂].