Struct CoefficientThreshold 

pub struct CoefficientThreshold(pub f64);

Drop terms whose coefficient magnitude is at most epsilon.

The test is |c|² > ε², so magnitudes below about 1.6e-162 count as zero.

Tuple Fields

0: f64

Magnitude threshold. Terms with |coeff| <= epsilon are dropped.

Trait Implementations

impl Clone for CoefficientThreshold

fn clone(&self) -> CoefficientThreshold

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CoefficientThreshold

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

Formats the value using the given formatter.

impl From<CoefficientThreshold> for BuiltinTruncation

fn from(p: CoefficientThreshold) -> Self

Converts to this type from the input type.

impl PartialEq for CoefficientThreshold

fn eq(&self, other: &CoefficientThreshold) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<const W: usize> TruncationPolicy<W> for CoefficientThreshold

fn keep_term(&self, _x: &[u64; W], _z: &[u64; W], c: Complex64) -> bool

Per-term filter, run inside the merge on every output, so it must be cheap.

fn finalizes_layer(&self) -> bool

Whether finalize_layer does anything, a hint that lets the engine skip it.

fn finalize_layer(&self, _sum: &mut PauliSum<W>)

Pass over the whole sum after each layer; PauliSum::retain is the easy way to write a filter here.

fn finalize_layer_partitioned( &self, local: &mut PauliSum<W>, collectives: &dyn Collectives, )

The layer pass over one partition’s slice of the layer, run on every layer on every partition in lock-step.

fn supports_partitioned(&self) -> bool

Whether finalize_layer_partitioned runs above one partition; every partitioned driver checks it before the first layer.

impl Copy for CoefficientThreshold

impl StructuralPartialEq for CoefficientThreshold