qat.purr.integrations.qiskit module

class QatBackend(hardware=None, comp_config=None, **fields)

Bases: QasmSimulatorPy

Basic qiskit backend built to run QASM on our own backends.

TODO: Expand this to become a proper back-end, as I don’t believe we need to inherit

off the QASM simulator as it stands.

Initialize a backend class

Args:

configuration (BackendConfiguration): A backend configuration

object for the backend object.

provider (qiskit.providers.Provider): Optionally, the provider

object that this Backend comes from.

fields: kwargs for the values to use to override the default

options.

Raises:

AttributeError: if input field not a valid options

In addition to the public abstract methods, subclasses should also implement the following private methods:

classmethod _default_options()

Return the default options

This method will return a qiskit.providers.Options subclass object that will be used for the default options. These should be the default parameters to use for the options of the backend.

Returns:

qiskit.providers.Options: A options object with

default values set

run(qobj, **backend_options)

Run on the backend.

Args:

run_input (QuantumCircuit or list): payload of the experiment backend_options (dict): backend options

Returns:

BasicAerJob: derived from BaseJob

Additional Information:

backend_options: Is a dict of options for the backend. It may contain

• “initial_statevector”: vector_like

The “initial_statevector” option specifies a custom initial initial statevector for the simulator to be used instead of the all zero state. This size of this vector must be correct for the number of qubits in run_input parameter.

Example:

backend_options = {
    "initial_statevector": np.array([1, 0, 0, 1j]) / np.sqrt(2),
}

run_qasm(qasm_str)

Runs the passed-in QASM string against the QASM state simulator.

run_qasm_circuit(circuit)

run_qasm_from_file(qasm_file)

Runs the passed-in QASM file against the QASM state simulator.