Struct ExpectationComputer 

pub struct ExpectationComputer { /* private fields */ }

Compute expectation values of observables.

Implementations

impl ExpectationComputer

pub fn new(n_qubits: usize) -> Self

Create a new expectation computer with default observables.

pub fn with_observables(observables: Vec<Array1<f64>>) -> Self

Create with custom observables.

pub fn add_observable(&mut self, observable: Array1<f64>)

Add an observable.

pub fn compute(&self, reservoir: &QuantumReservoir) -> QearResult<Array1<f64>>

Compute expectation values for all observables.

pub fn compute_single( &self, reservoir: &QuantumReservoir, observable_idx: usize, ) -> QearResult<f64>

Compute expectation value for a single observable.

pub fn num_observables(&self) -> usize

Get the number of observables.

Trait Implementations

impl Clone for ExpectationComputer

fn clone(&self) -> ExpectationComputer

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExpectationComputer

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

Formats the value using the given formatter.