QasmBackendConfiguration

qiskit.providers.models.QasmBackendConfiguration(backend_name, backend_version, n_qubits, basis_gates, gates, local, simulator, conditional, open_pulse, memory, max_shots, coupling_map, supported_instructions=None, dynamic_reprate_enabled=False, rep_delay_range=None, default_rep_delay=None, max_experiments=None, sample_name=None, n_registers=None, register_map=None, configurable=None, credits_required=None, online_date=None, display_name=None, description=None, tags=None, dt=None, dtm=None, processor_type=None, parametric_pulses=None, **kwargs)

Bases: object (opens in a new tab)

Class representing an OpenQASM 2.0 Backend Configuration.

backend_name

backend name.

backend_version

backend version in the form X.Y.Z.

n_qubits

number of qubits.

basis_gates

list of basis gates names on the backend.

gates

list of basis gates on the backend.

local

backend is local or remote.

simulator

backend is a simulator.

conditional

backend supports conditional operations.

open_pulse

backend supports open pulse.

memory

backend supports memory.

max_shots

maximum number of shots supported.

Initialize a QasmBackendConfiguration Object

Parameters

• backend_name (str (opens in a new tab)) – The backend name

• backend_version (str (opens in a new tab)) – The backend version in the form X.Y.Z

• n_qubits (int (opens in a new tab)) – the number of qubits for the backend

• basis_gates (list (opens in a new tab)) – The list of strings for the basis gates of the backends

• gates (list (opens in a new tab)) – The list of GateConfig objects for the basis gates of the backend

• local (bool (opens in a new tab)) – True if the backend is local or False if remote

• simulator (bool (opens in a new tab)) – True if the backend is a simulator

• conditional (bool (opens in a new tab)) – True if the backend supports conditional operations

• open_pulse (bool (opens in a new tab)) – True if the backend supports OpenPulse

• memory (bool (opens in a new tab)) – True if the backend supports memory

• max_shots (int (opens in a new tab)) – The maximum number of shots allowed on the backend

• coupling_map (list (opens in a new tab)) – The coupling map for the device

• supported_instructions (List[str (opens in a new tab)]) – Instructions supported by the backend.

• dynamic_reprate_enabled (bool (opens in a new tab)) – whether delay between programs can be set dynamically (ie via rep_delay). Defaults to False.

• rep_delay_range (List[float (opens in a new tab)]) – 2d list defining supported range of repetition delays for backend in μs. First entry is lower end of the range, second entry is higher end of the range. Optional, but will be specified when dynamic_reprate_enabled=True.

• default_rep_delay (float (opens in a new tab)) – Value of rep_delay if not specified by user and dynamic_reprate_enabled=True.

• max_experiments (int (opens in a new tab)) – The maximum number of experiments per job

• sample_name (str (opens in a new tab)) – Sample name for the backend

• n_registers (int (opens in a new tab)) – Number of register slots available for feedback (if conditional is True)

• register_map (list (opens in a new tab)) – An array of dimension n_qubits X n_registers that specifies whether a qubit can store a measurement in a certain register slot.

• configurable (bool (opens in a new tab)) – True if the backend is configurable, if the backend is a simulator

• credits_required (bool (opens in a new tab)) – True if backend requires credits to run a job.

• online_date (datetime.datetime (opens in a new tab)) – The date that the device went online

• display_name (str (opens in a new tab)) – Alternate name field for the backend

• description (str (opens in a new tab)) – A description for the backend

• tags (list (opens in a new tab)) – A list of string tags to describe the backend

• dt (float (opens in a new tab)) – Qubit drive channel timestep in nanoseconds.

• dtm (float (opens in a new tab)) – Measurement drive channel timestep in nanoseconds.

• processor_type (dict (opens in a new tab)) –

  Processor type for this backend. A dictionary of the form {"family": <str>, "revision": <str>, segment: <str>} such as {"family": "Canary", "revision": "1.0", segment: "A"}.

  • family: Processor family of this backend.
  • revision: Revision version of this processor.
  • segment: Segment this processor belongs to within a larger chip.

• parametric_pulses (list (opens in a new tab)) – A list of pulse shapes which are supported on the backend. For example: ['gaussian', 'constant']

• **kwargs – optional fields

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Attributes

num_qubits

Returns the number of qubits.

In future, n_qubits should be replaced in favor of num_qubits for consistent use throughout Qiskit. Until this is properly refactored, this property serves as intermediate solution.

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Methods

from_dict

classmethod from_dict(data)

Create a new GateConfig object from a dictionary.

Parameters

data (dict (opens in a new tab)) – A dictionary representing the GateConfig to create. It will be in the same format as output by to_dict().

Returns

The GateConfig from the input dictionary.

Return type

GateConfig

to_dict

to_dict()

Return a dictionary format representation of the GateConfig.

Returns

The dictionary form of the GateConfig.

Return type

dict (opens in a new tab)