Struct QuantumChannel 

pub struct QuantumChannel {
    pub input_dim: usize,
    pub output_dim: usize,
    pub kraus: Option<KrausRepresentation>,
    pub choi: Option<ChoiRepresentation>,
    pub stinespring: Option<StinespringRepresentation>,
    /* private fields */
}

A quantum channel represented in various forms

Fields

input_dim: usize

Number of input qubits

output_dim: usize

Number of output qubits

kraus: Option<KrausRepresentation>

Kraus operator representation

choi: Option<ChoiRepresentation>

Choi matrix representation

stinespring: Option<StinespringRepresentation>

Stinespring dilation representation

Implementations

impl QuantumChannel

pub fn from_kraus(operators: Vec<Array2<Complex<f64>>>) -> QuantRS2Result<Self>

Create a new quantum channel from Kraus operators

pub fn from_choi(matrix: Array2<Complex<f64>>) -> QuantRS2Result<Self>

Create a quantum channel from a Choi matrix.

This constructor assumes a square channel, i.e. equal input and output dimensions (input_dim == output_dim == d). The Choi matrix of such a channel has dimension total_dim = d * d, so requiring total_dim to be a perfect square is the correct, exact constraint for this case (it is not a placeholder approximation). Rectangular channels (d_in != d_out) are not constructed through this entry point.

pub fn to_kraus(&mut self) -> QuantRS2Result<&KrausRepresentation>

Convert to Kraus representation

pub fn to_choi(&mut self) -> QuantRS2Result<&ChoiRepresentation>

Convert to Choi representation

pub fn to_stinespring(&mut self) -> QuantRS2Result<&StinespringRepresentation>

Convert to Stinespring representation

pub fn apply( &mut self, rho: &Array2<Complex<f64>>, ) -> QuantRS2Result<Array2<Complex<f64>>>

Apply the channel to a density matrix

pub fn is_unitary(&mut self) -> QuantRS2Result<bool>

Check if channel is unitary

pub fn is_depolarizing(&mut self) -> QuantRS2Result<bool>

Check if channel is a depolarizing channel

pub fn depolarizing_parameter(&mut self) -> QuantRS2Result<Option<f64>>

Get the depolarizing parameter if this is a depolarizing channel

Trait Implementations

impl Clone for QuantumChannel

fn clone(&self) -> QuantumChannel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QuantumChannel

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

Formats the value using the given formatter.