Struct IdentityChannel 

pub struct IdentityChannel { /* private fields */ }

A channel that maps every input Pauli to itself with the same coefficient.

support() is empty, so the engine’s bucket layout collapses to a single bucket and the only effect is to copy the input through. max_fanout() is 1.

Implementations

impl IdentityChannel

pub const fn new() -> Self

Construct an identity channel.

Trait Implementations

impl<const W: usize> Channel<W> for IdentityChannel

fn max_fanout(&self) -> usize

Maximum number of output terms produced per input term. Used by the engine to size the scratch buffer up-front.

fn support(&self) -> &[u32]

Qubits this channel acts on. Outputs differ from inputs only at these bit positions; the engine uses this for bucket layout (§5).

fn apply( &self, input_x: &[u64; W], input_z: &[u64; W], coeff: Complex64, out: &mut OutputBuffer<'_, W>, )

Apply the channel to a single input term, writing outputs to out.

fn apply_adjoint( &self, input_x: &[u64; W], input_z: &[u64; W], coeff: Complex64, out: &mut OutputBuffer<'_, W>, )

Apply the channel’s adjoint to a single input term, writing outputs to out. Used by the engine in Direction::Heisenberg mode for backpropagating observables.

impl Clone for IdentityChannel

fn clone(&self) -> IdentityChannel

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IdentityChannel

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

Formats the value using the given formatter.

impl Default for IdentityChannel

fn default() -> IdentityChannel

Returns the “default value” for a type.

impl Copy for IdentityChannel