qiskit.transpiler.passes.StochasticSwap

class StochasticSwap(*args, **kwargs)

Map a DAGCircuit onto a coupling_map adding swap gates.

Uses a randomized algorithm.

참고

1. Measurements may occur and be followed by swaps that result in repeated measurement of the same qubit. Near-term experiments cannot implement these circuits, so some care is required when using this mapper with experimental backend targets.

2. We do not use the fact that the input state is zero to simplify the circuit.

StochasticSwap initializer.

The coupling map is a connected graph

If these are not satisfied, the behavior is undefined.

매개변수

• coupling_map (CouplingMap) – Directed graph representing a coupling map.

• trials (int) – maximum number of iterations to attempt

• seed (int) – seed for random number generator

__init__(coupling_map, trials=20, seed=None)

StochasticSwap initializer.

The coupling map is a connected graph

If these are not satisfied, the behavior is undefined.

매개변수

• coupling_map (CouplingMap) – Directed graph representing a coupling map.

• trials (int) – maximum number of iterations to attempt

• seed (int) – seed for random number generator

Methods

__init__(coupling_map[, trials, seed])	StochasticSwap initializer.
name()	Return the name of the pass.
run(dag)	Run the StochasticSwap pass on dag.

Attributes

is_analysis_pass	Check if the pass is an analysis pass.
is_transformation_pass	Check if the pass is a transformation pass.

property is_analysis_pass

Check if the pass is an analysis pass.

If the pass is an AnalysisPass, that means that the pass can analyze the DAG and write the results of that analysis in the property set. Modifications on the DAG are not allowed by this kind of pass.

property is_transformation_pass

Check if the pass is a transformation pass.

If the pass is a TransformationPass, that means that the pass can manipulate the DAG, but cannot modify the property set (but it can be read).

name()

Return the name of the pass.

run(dag)

Run the StochasticSwap pass on dag.

매개변수

dag (DAGCircuit) – DAG to map.

반환값

A mapped DAG.

반환 형식

DAGCircuit

예외

• TranspilerError – if the coupling map or the layout are not

• compatible with the DAG –