Struct QuantumChannel 

pub struct QuantumChannel { /* private fields */ }

Quantum channel representation

Implementations

impl QuantumChannel

pub fn from_kraus( kraus: Vec<Array2<Complex64>>, ) -> Result<Self, QuantumInfoError>

Create a quantum channel from Kraus operators

pub fn identity(dim: usize) -> Self

Create an identity channel

pub fn unitary(u: Array2<Complex64>) -> Result<Self, QuantumInfoError>

Create a unitary channel U ρ U†

pub fn depolarizing(p: f64) -> Self

Create a depolarizing channel

E(ρ) = (1-p)ρ + p/3 (XρX + YρY + ZρZ)

pub fn amplitude_damping(gamma: f64) -> Self

Create an amplitude damping channel (T1 decay)

E(ρ) = K₀ρK₀† + K₁ρK₁† K₀ = [[1, 0], [0, √(1-γ)]] K₁ = [[0, √γ], [0, 0]]

pub fn phase_damping(gamma: f64) -> Self

Create a phase damping channel (T2 decay)

E(ρ) = K₀ρK₀† + K₁ρK₁†

pub fn apply( &self, state: &QuantumState, ) -> Result<QuantumState, QuantumInfoError>

Apply the channel to a quantum state

pub fn input_dim(&self) -> usize

Get input dimension

pub fn output_dim(&self) -> usize

Get output dimension

pub fn to_choi(&self) -> Result<Array2<Complex64>, QuantumInfoError>

Convert to Choi matrix representation

Λ_E = (E ⊗ I)(|Ω⟩⟨Ω|) where |Ω⟩ = Σᵢ |ii⟩ is the maximally entangled state

pub fn to_ptm(&self) -> Result<Array2<Complex64>, QuantumInfoError>

Convert to Pauli transfer matrix (PTM) representation

R_ij = Tr[P_i E(P_j)] / d where {P_i} is the Pauli basis

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.