PulseSystemModel

class PulseSystemModel(hamiltonian=None, qubit_freq_est=None, meas_freq_est=None, u_channel_lo=None, control_channel_labels=None, subsystem_list=None, dt=None)[source]

Physical model object for pulse simulator.

This class contains model information required by the PulseSimulator. It contains:

  • "hamiltonian": a HamiltonianModel object representing the Hamiltonian of the system.

  • "qubit_freq_est" and "meas_freq_est": optional default values for qubit and measurement frequencies.

  • "u_channel_lo": A description of ControlChannel local oscillator frequencies in terms of qubit local oscillator frequencies.

  • "control_channel_labels": Optional list of identifying information for each ControlChannel that the model supports.

  • "subsystem_list": List of subsystems in the model.

  • "dt": Sample width size for OpenPulse instructions.

A model can be instantiated from the helper function duffing_system_model(), or using the PulseSystemModel.from_backend() constructor.

Example

Constructing from a backend:

Initialize a PulseSystemModel.

Parameters

  • hamiltonian (HamiltonianModel) – The Hamiltonian of the system.

  • qubit_freq_est (list) – list of qubit lo frequencies defaults to be used in simulation if none are specified in the PulseQobj.

  • meas_freq_est (list) – list of qubit meas frequencies defaults to be used in simulation if none are specified in the PulseQobj.

  • u_channel_lo (list) – list of ControlChannel frequency specifications.

  • control_channel_labels (list) – list of labels for control channels, which can be of any type.

  • subsystem_list (list) – list of valid qubit indicies for the model.

  • dt (float) – pixel size for pulse Instructions.

Raises

AerError – if hamiltonian is not None or a HamiltonianModel

Methods

PulseSystemModel.calculate_channel_frequencies([…])

Calculate frequencies for each channel given qubit_lo_freq.

PulseSystemModel.control_channel_index(label)

Return the index of the control channel with identifying label.

PulseSystemModel.from_backend(backend[, …])

Returns a PulseSystemModel constructed from an OpenPulse enabled backend object.