Function entanglement_spectrum_sector 

pub fn entanglement_spectrum_sector<State>(
    amplitudes: &[Complex64],
    basis_states: &[State],
    total_sites: usize,
    retained_sites: &[usize],
    noncommuting_groups: &[NoncommutingGroup],
) -> Result<Vec<f64>>
where
    State: BinaryState,

Entanglement spectrum of a pure state represented in a binary sector.