BackendV2Converter
class BackendV2Converter(backend, name_mapping=None, add_delay=False)
Bases: qiskit.providers.backend.BackendV2
A converter class that takes a BackendV1 instance and wraps it in a BackendV2 interface.
This class implements the BackendV2 interface and is used to enable common access patterns between BackendV1 and BackendV2. This class should only be used if you need a BackendV2 and still need compatibility with BackendV1.
Initialize a BackendV2 converter instance based on a BackendV1 instance.
Parameters
- backend (
BackendV1) – The inputBackendV1based backend to wrap in aBackendV2interface - name_mapping (
Optional[Dict[str,Any]]) – An optional dictionary that maps custom gate/operation names inbackendto anOperationobject representing that gate/operation. By default most standard gates names are mapped to the standard gate object fromqiskit.circuit.librarythis only needs to be specified if the inputbackenddefines gates in names outside that set. - add_delay (
bool) – If set to true aDelayoperation will be added to the target as a supported operation for all qubits
Methods
acquire_channel
BackendV2Converter.acquire_channel(qubit)
Return the acquisition channel for the given qubit.
This is required to be implemented if the backend supports Pulse scheduling.
Returns
The Qubit measurement acquisition line.
Return type
Raises
NotImplementedError – if the backend doesn’t support querying the measurement mapping
control_channel
BackendV2Converter.control_channel(qubits)
Return the secondary drive channel for the given qubit
This is typically utilized for controlling multiqubit interactions. This channel is derived from other channels.
This is required to be implemented if the backend supports Pulse scheduling.
Parameters
qubits (Iterable[int]) – Tuple or list of qubits of the form (control_qubit, target_qubit).
Returns
The multi qubit control line.
Return type
List[ControlChannel]
Raises
NotImplementedError – if the backend doesn’t support querying the measurement mapping
drive_channel
BackendV2Converter.drive_channel(qubit)
Return the drive channel for the given qubit.
This is required to be implemented if the backend supports Pulse scheduling.
Returns
The Qubit drive channel
Return type
Raises
NotImplementedError – if the backend doesn’t support querying the measurement mapping
measure_channel
BackendV2Converter.measure_channel(qubit)
Return the measure stimulus channel for the given qubit.
This is required to be implemented if the backend supports Pulse scheduling.
Returns
The Qubit measurement stimulus line
Return type
Raises
NotImplementedError – if the backend doesn’t support querying the measurement mapping
qubit_properties
BackendV2Converter.qubit_properties(qubit)
Return QubitProperties for a given qubit.
If there are no defined or the backend doesn’t support querying these details this method does not need to be implemented.
Parameters
qubit (Union[int, List[int]]) – The qubit to get the QubitProperties object for. This can be a single integer for 1 qubit or a list of qubits and a list of QubitProperties objects will be returned in the same order
Returns
The QubitProperties object for the specified qubit. If a list of qubits is provided a list will be returned. If properties are missing for a qubit this can be None.
Return type
qubit_properties
Raises
NotImplementedError – if the backend doesn’t support querying the qubit properties
run
BackendV2Converter.run(run_input, **options)
Run on the backend.
This method returns a Job object that runs circuits. Depending on the backend this may be either an async or sync call. It is at the discretion of the provider to decide whether running should block until the execution is finished or not: the Job class can handle either situation.
Parameters
- run_input (QuantumCircuit orSchedule orScheduleBlock or list) – An individual or a list of
ScheduleBlock, orScheduleobjects to run on the backend. - options – Any kwarg options to pass to the backend for running the config. If a key is also present in the options attribute/object then the expectation is that the value specified will be used instead of what’s set in the options object.
Returns
The job object for the run
Return type
set_options
BackendV2Converter.set_options(**fields)
Set the options fields for the backend
This method is used to update the options of a backend. If you need to change any of the options prior to running just pass in the kwarg with the new value for the options.
Parameters
fields – The fields to update the options
Raises
AttributeError – If the field passed in is not part of the options
Attributes
coupling_map
Return the CouplingMap object
dt
Return the system time resolution of input signals
This is required to be implemented if the backend supports Pulse scheduling.
Returns
The input signal timestep in seconds. If the backend doesn’t define dt None will be returned
Return type
dt
dtm
Return type
float
instruction_durations
Return the InstructionDurations object.
instruction_schedule_map
Return the InstructionScheduleMap for the instructions defined in this backend’s target.
instructions
A list of Instruction tuples on the backend of the form (instruction, (qubits)
Return type
List[Tuple[Instruction, Tuple[int]]]
max_circuits
meas_map
Return type
List[List[int]]
num_qubits
Return the number of qubits the backend has.
Return type
int
operation_names
A list of instruction names that the backend supports.
Return type
List[str]
operations
options
Return the options for the backend
The options of a backend are the dynamic parameters defining how the backend is used. These are used to control the run() method.
provider
target
version
Default value: 2