SnapshotProbabilities

class SnapshotProbabilities(label, num_qubits, variance=False)

Bases: qiskit.providers.aer.extensions.snapshot.Snapshot

Snapshot instruction for all methods of Qasm simulator.

Create a probability snapshot instruction.

Parameters

• label (str) – the snapshot label.

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

• variance (bool) – compute variance of probabilities [Default: False]

Raises

ExtensionError – if snapshot is invalid.

Note

This instruction will be deprecated after the qiskit-aer 0.8 release. It has been superseded by the qiskit.providers.aer.library.SaveProbabilities and qiskit.providers.aer.library.SaveProbabilitiesDict instructions.

Methods

add_decomposition	Add a decomposition of the instruction to the SessionEquivalenceLibrary.
assemble	Assemble a QasmQobjInstruction
broadcast_arguments	Validation of the arguments.
c_if	Add classical condition on register or cbit classical and value val.
copy	Copy of the instruction.
define_snapshot_register	Defines qubits to snapshot for all snapshot methods
inverse	Special case.
is_parameterized	Return True .IFF.
mirror	DEPRECATED: use instruction.reverse_ops().
qasm	Return a default OpenQASM string for the instruction.
repeat	Creates an instruction with gate repeated n amount of times.
reverse_ops	For a composite instruction, reverse the order of sub-instructions.
soft_compare	Soft comparison between gates.
validate_parameter	Instruction parameters has no validation or normalization.

Attributes

decompositions

Get the decompositions of the instruction from the SessionEquivalenceLibrary.

definition

Return definition in terms of other basic gates.

duration

Get the duration.

label

Return snapshot label

params

return instruction params.

snapshot_type

Return snapshot type

unit

Get the time unit of duration.