Struct ParametricCNOT 

pub struct ParametricCNOT {
    pub control: usize,
    pub target: usize,
}

Non-parametric CNOT gate, used for the entangling layers of ansätze such as ansatze::hardware_efficient. It has no free parameters (an empty ParametricGate::parameter_indices), so parameter-shift/finite- difference/SPSA gradient computation simply never varies it, and its own gradient with respect to any parameter is the zero matrix.

Fields

control: usize

target: usize

Trait Implementations

impl ParametricGate for ParametricCNOT

fn name(&self) -> &'static str

Get gate name

fn qubits(&self) -> Vec<usize>

Get qubits this gate acts on

fn parameter_indices(&self) -> Vec<usize>

Get parameter indices this gate depends on

fn matrix(&self, _params: &[f64]) -> Result<Array2<Complex64>>

Evaluate gate matrix given parameter values

fn gradient( &self, _params: &[f64], _param_idx: usize, ) -> Result<Array2<Complex64>>

Compute gradient of gate matrix with respect to each parameter

fn parameter_shift_gradient( &self, params: &[f64], param_idx: usize, ) -> Result<(Array2<Complex64>, Array2<Complex64>)>

Apply parameter-shift rule for this gate