atlas_q.diagnostics.bond_entropy_from_S# atlas_q.diagnostics.bond_entropy_from_S(S)[source]# Compute entanglement entropy from singular values S = -Σ_i p_i log(p_i) where p_i = σ_i² / Σ_j σ_j² Args:S: Singular values (sorted descending) Returns:Entanglement entropy in bits (log base 2)
