Struct GroundStateEnergyGradient 

pub struct GroundStateEnergyGradient {
    pub energy: f64,
    pub state: Vec<Complex64>,
    pub gradient: ParameterGradient,
    pub diagnostics: GradientDiagnostics,
    pub eigensolver_iterations: usize,
}

Ground-state energy, Hellmann–Feynman gradient, and solver evidence.

This rule differentiates an isolated lowest eigenvalue of a real-parameter Hermitian operator family. It deliberately does not return a derivative of an arbitrarily phased eigenvector.

Fields

energy: f64

Algebraically smallest eigenvalue.

state: Vec<Complex64>

Normalized eigenvector used by the Hellmann–Feynman rule.

gradient: ParameterGradient

Ordered dE/dθᵢ = ⟨ψ|Aᵢ|ψ⟩.

diagnostics: GradientDiagnostics

Residual and spectral-separation evidence.

eigensolver_iterations: usize

Eigensolver iteration count.

Trait Implementations

impl Clone for GroundStateEnergyGradient

fn clone(&self) -> GroundStateEnergyGradient

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GroundStateEnergyGradient

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

Formats the value using the given formatter.