qiskit.circuit.QuantumCircuit.snapshot_density_matrix

QuantumCircuit.snapshot_density_matrix(label, qubits=None)

Take a density matrix snapshot of simulator state.

Parameters

• label (str) – a snapshot label to report the result

• qubits (list or None) – the qubits to apply snapshot to. If None all qubits will be snapshot [Default: None].

Returns

with attached instruction.

Return type

QuantumCircuit

Raises

ExtensionError – if snapshot is invalid.

Note

This method will be deprecated after the qiskit-aer 0.8 release. It has been superseded by the qiskit.providers.aer.library.save_density_matrix() circuit method.