Enum BackendKind 

pub enum BackendKind {
    Auto,
    Statevector,
    Stabilizer,
    Sparse,
    Mps {
        max_bond_dim: usize,
    },
    ProductState,
    TensorNetwork,
    Factored,
    StabilizerRank,
    FilteredStabilizer,
    FactoredStabilizer,
    StochasticPauli {
        num_samples: usize,
    },
    DeterministicPauli {
        epsilon: f64,
        max_terms: usize,
    },
}

Automatically select the optimal backend based on circuit analysis.

Decision tree:

1. No entangling gates → ProductState (O(n))
2. All Clifford gates → Stabilizer (O(n²))
3. Clifford+T, t ≤ 12 → StabilizerRank (O(2^t · n²))
4. Above memory limit: a. Sparse-friendly → Sparse (O(k) where k = non-zero amplitudes) b. Otherwise → MPS (bounded bond dimension)
5. Otherwise → Statevector (exact, general-purpose)

Variants

Auto

Statevector

Stabilizer

Sparse

Mps

Fields

max_bond_dim: usize

ProductState

TensorNetwork

Factored

StabilizerRank

FilteredStabilizer

FactoredStabilizer

StochasticPauli

Fields

num_samples: usize

DeterministicPauli

Fields

epsilon: f64

max_terms: usize

Implementations

impl BackendKind

pub fn supports_noisy_per_shot(&self) -> bool

pub fn supports_general_noise(&self) -> bool

Trait Implementations

impl Clone for BackendKind

fn clone(&self) -> BackendKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BackendKind

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

Formats the value using the given formatter.