ObjectiveEvaluator

quantrs2_device::vqa_support::objectives

Struct ObjectiveEvaluator 

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pub struct ObjectiveEvaluator {
    pub config: ObjectiveConfig,
    pub circuit: Arc<ParametricCircuit>,
    pub backend: ObjectiveBackend,
    pub cached_hamiltonian: Option<HamiltonianMatrix>,
    pub measurement_groups: Option<Vec<MeasurementGroup>>,
}
Expand description

Comprehensive objective function evaluator with SciRS2 integration

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§config: ObjectiveConfig

Configuration

§circuit: Arc<ParametricCircuit>

Parametric circuit reference

§backend: ObjectiveBackend

Quantum simulator backend

§cached_hamiltonian: Option<HamiltonianMatrix>

Cached Hamiltonian matrix (for efficiency)

§measurement_groups: Option<Vec<MeasurementGroup>>

Measurement groupings (for optimization)

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impl ObjectiveEvaluator

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pub fn new( config: ObjectiveConfig, circuit: ParametricCircuit, backend: ObjectiveBackend, ) -> Self

Create new objective evaluator

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pub fn with_hamiltonian_caching(self) -> DeviceResult<Self>

Initialize with Hamiltonian caching

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pub fn with_measurement_grouping(self) -> DeviceResult<Self>

Initialize measurement grouping optimization

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impl Debug for ObjectiveEvaluator

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

Formats the value using the given formatter. Read more
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impl ObjectiveFunction for ObjectiveEvaluator

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fn evaluate(&self, parameters: &Array1<f64>) -> DeviceResult<ObjectiveResult>

Comprehensive objective function evaluation

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fn compute_gradient_with_method( &self, parameters: &Array1<f64>, method: &GradientMethod, ) -> DeviceResult<Array1<f64>>

Compute gradient with specified method

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fn estimate_cost(&self, parameters: &Array1<f64>) -> usize

Estimate computational cost

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fn parameter_bounds(&self) -> Option<Vec<(f64, f64)>>

Get parameter bounds

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fn supports_batch_evaluation(&self) -> bool

Check batch evaluation support

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fn compute_gradient( &self, parameters: &Array1<f64>, ) -> DeviceResult<Array1<f64>>

Compute gradient using specified method
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fn batch_evaluate( &self, parameter_sets: &[Array1<f64>], ) -> DeviceResult<Vec<ObjectiveResult>>

Batch evaluate multiple parameter sets (if supported)

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