Struct LanczosRitzDecomposition 

pub struct LanczosRitzDecomposition {
    pub decomposition: LanczosDecomposition,
    pub eigenvalues: Vec<f64>,
    pub eigenvectors: Vec<Vec<f64>>,
}

Fields

decomposition: LanczosDecomposition

eigenvalues: Vec<f64>

eigenvectors: Vec<Vec<f64>>

Column-oriented eigenvectors of the real symmetric tridiagonal matrix.

Implementations

impl LanczosRitzDecomposition

pub fn linear_combination( &self, coefficients: &[Complex64], ) -> Result<Vec<Complex64>>

Lift coefficients in Krylov-basis order back to the full Hilbert space.

pub fn exponential_action( &self, coefficient: Complex64, ) -> Result<Vec<Complex64>>

Apply exp(coefficient * T) to the first Krylov vector and lift it through the stored Lanczos basis.

impl LanczosRitzDecomposition

pub fn project_thermal_observables( &self, observables: &[(String, &dyn LinearOperator)], method: ThermalLanczosMethod, ) -> Result<Vec<ProjectedThermalObservable>>

Apply observables to the stored Krylov basis and return only the projected data required by the selected thermal contraction.

pub fn thermal_observable_iteration( &self, method: ThermalLanczosMethod, observables: &[(String, &dyn LinearOperator)], inverse_temperatures: &[f64], ) -> Result<ThermalObservableIteration>

Trait Implementations

impl Clone for LanczosRitzDecomposition

fn clone(&self) -> LanczosRitzDecomposition

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LanczosRitzDecomposition

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.