SnapshotDensityMatrix

class SnapshotDensityMatrix(label, num_qubits)

Snapshot instruction for density matrix method of Qasm simulator.

Create a density matrix state snapshot instruction.

Parameters

• label (str) – the snapshot label.

• num_qubits (int) – the number of qubits to snapshot.

Raises

ExtensionError – if snapshot is invalid.

Attributes

SnapshotDensityMatrix.decompositions	Get the decompositions of the instruction from the SessionEquivalenceLibrary.
SnapshotDensityMatrix.definition	Return definition in terms of other basic gates.
SnapshotDensityMatrix.label	Return snapshot label
SnapshotDensityMatrix.params	return instruction params.
SnapshotDensityMatrix.snapshot_type	Return snapshot type

Methods

SnapshotDensityMatrix.add_decomposition(…)	Add a decomposition of the instruction to the SessionEquivalenceLibrary.
SnapshotDensityMatrix.assemble()	Assemble a QasmQobjInstruction
SnapshotDensityMatrix.broadcast_arguments(…)	Validation of the arguments.
SnapshotDensityMatrix.c_if(classical, val)	Add classical condition on register classical and value val.
SnapshotDensityMatrix.copy([name])	Copy of the instruction.
SnapshotDensityMatrix.define_snapshot_register(…)	Defines qubits to snapshot for all snapshot methods
SnapshotDensityMatrix.inverse()	Special case.
SnapshotDensityMatrix.is_parameterized()	Return True .IFF.
SnapshotDensityMatrix.mirror()	For a composite instruction, reverse the order of sub-gates.
SnapshotDensityMatrix.qasm()	Return a default OpenQASM string for the instruction.
SnapshotDensityMatrix.repeat(n)	Creates an instruction with gate repeated n amount of times.