Function mutual_information 

pub fn mutual_information(
    state: &QuantumState,
    dims: (usize, usize),
    base: Option<f64>,
) -> Result<f64, QuantumInfoError>

Calculate the quantum mutual information of a bipartite state.

I(A:B) = S(ρ_A) + S(ρ_B) - S(ρ_AB)

Arguments

• state - Bipartite quantum state
• dims - Dimensions of subsystems (dim_A, dim_B)
• base - Logarithm base (default: 2)

Returns

The mutual information I ≥ 0