IonQ Backends¶

IonQ provider backends.

class qiskit_ionq.ionq_backend.IonQBackend(*args, **kwargs)[source]¶

IonQ Backend base class.

Initialize a backend class

Parameters:

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()[source]

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:

A options object with: default values set

Return type:

qiskit.providers.Options

calibration()[source]¶

Fetch the most recent calibration data for this backend.

Returns:: A calibration data wrapper.
Return type:: Calibration

cancel_job(job_id)[source]¶: cancels a job from a specific backend, by job id.

cancel_jobs(job_ids)[source]¶: cancels a list of jobs from a specific backend, job id

property client¶

A lazily populated IonQ API Client.

Returns:: An instance of a REST API client
Return type:: IonQClient

configuration()¶

Return the backend configuration.

Returns:: the configuration for the backend.
Return type:: BackendConfiguration

create_client()[source]¶

Create an IonQ REST API Client using provider credentials.

Raises:: IonQCredentialsError – If the provider’s credentials does not have a "token" or "url" key, or if their values are None.
Returns:: An instance of a REST API client.
Return type:: IonQClient

abstract gateset()[source]¶: Helper method returning the gateset this backend is targeting.

has_valid_mapping(circuit) → bool[source]¶

checks if the circuit has at least one valid qubit -> bit measurement.

Parameters:: circuit (QuantumCircuit) – A Qiskit QuantumCircuit object.
Returns:: if the circuit has valid mappings
Return type:: boolean

name()¶

Return the backend name.

Returns:: the name of the backend.
Return type:: str

property 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.

properties()¶

Return the backend properties.

Returns:: the configuration for the backend. If the backend does not support properties, it returns None.
Return type:: BackendProperties

provider()¶

Return the backend Provider.

Returns:: the Provider responsible for the backend.
Return type:: Provider

retrieve_job(job_id)[source]¶: get a job from a specific backend, by job id.

retrieve_jobs(job_ids)[source]¶: get a list of jobs from a specific backend, job id

run(circuit, **kwargs)[source]¶

Create and run a job on an IonQ Backend.

Parameters:: circuit (QuantumCircuit) – A Qiskit QuantumCircuit object.
Returns:: A reference to the job that was submitted.
Return type:: IonQJob

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

status()[source]¶

Return a backend status object to the caller.

Returns:: the status of the backend.
Return type:: BackendStatus

abstract with_name(name, **kwargs)[source]¶: Helper method that returns this backend with a more specific target system.

class qiskit_ionq.ionq_backend.IonQQPUBackend(provider, name='ionq_qpu', gateset='qis')[source]¶

IonQ Backend for running qpu-based jobs.

Initialize a backend class

Parameters:

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:

A options object with: default values set

Return type:

qiskit.providers.Options

calibration()¶

Fetch the most recent calibration data for this backend.

Returns:: A calibration data wrapper.
Return type:: Calibration

cancel_job(job_id)¶: cancels a job from a specific backend, by job id.

cancel_jobs(job_ids)¶: cancels a list of jobs from a specific backend, job id

property client¶

A lazily populated IonQ API Client.

Returns:: An instance of a REST API client
Return type:: IonQClient

configuration()¶

Return the backend configuration.

Returns:: the configuration for the backend.
Return type:: BackendConfiguration

create_client()¶

Create an IonQ REST API Client using provider credentials.

Raises:: IonQCredentialsError – If the provider’s credentials does not have a "token" or "url" key, or if their values are None.
Returns:: An instance of a REST API client.
Return type:: IonQClient

gateset()[source]¶: Helper method returning the gateset this backend is targeting.

has_valid_mapping(circuit) → bool¶

checks if the circuit has at least one valid qubit -> bit measurement.

Parameters:: circuit (QuantumCircuit) – A Qiskit QuantumCircuit object.
Returns:: if the circuit has valid mappings
Return type:: boolean

name()¶

Return the backend name.

Returns:: the name of the backend.
Return type:: str

property 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.

properties()¶

Return the backend properties.

Returns:: the configuration for the backend. If the backend does not support properties, it returns None.
Return type:: BackendProperties

provider()¶

Return the backend Provider.

Returns:: the Provider responsible for the backend.
Return type:: Provider

retrieve_job(job_id)¶: get a job from a specific backend, by job id.

retrieve_jobs(job_ids)¶: get a list of jobs from a specific backend, job id

run(circuit, **kwargs)¶

Create and run a job on an IonQ Backend.

Parameters:: circuit (QuantumCircuit) – A Qiskit QuantumCircuit object.
Returns:: A reference to the job that was submitted.
Return type:: IonQJob

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

status()¶

Return a backend status object to the caller.

Returns:: the status of the backend.
Return type:: BackendStatus

with_name(name, **kwargs)[source]¶: Helper method that returns this backend with a more specific target system.

class qiskit_ionq.ionq_backend.IonQSimulatorBackend(provider, name='simulator', gateset='qis')[source]¶

IonQ Backend for running simulated jobs.

Attention

When noise_model ideal is specified, the maximum shot-count for a state vector sim is always 1.

Attention

When noise_model ideal is specified, calling get_counts on a job processed by this backend will return counts expressed as probabilites, rather than a multiple of shots.

Base class for interfacing with an IonQ backend

calibration()[source]¶

Simulators have no calibration data.

Returns:: None
Return type:: NoneType

cancel_job(job_id)¶: cancels a job from a specific backend, by job id.

cancel_jobs(job_ids)¶: cancels a list of jobs from a specific backend, job id

property client¶

A lazily populated IonQ API Client.

Returns:: An instance of a REST API client
Return type:: IonQClient

configuration()¶

Return the backend configuration.

Returns:: the configuration for the backend.
Return type:: BackendConfiguration

create_client()¶

Create an IonQ REST API Client using provider credentials.

Raises:: IonQCredentialsError – If the provider’s credentials does not have a "token" or "url" key, or if their values are None.
Returns:: An instance of a REST API client.
Return type:: IonQClient

gateset()[source]¶: Helper method returning the gateset this backend is targeting.

has_valid_mapping(circuit) → bool¶

checks if the circuit has at least one valid qubit -> bit measurement.

Parameters:: circuit (QuantumCircuit) – A Qiskit QuantumCircuit object.
Returns:: if the circuit has valid mappings
Return type:: boolean

name()¶

Return the backend name.

Returns:: the name of the backend.
Return type:: str

property 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.

properties()¶

Return the backend properties.

Returns:: the configuration for the backend. If the backend does not support properties, it returns None.
Return type:: BackendProperties

provider()¶

Return the backend Provider.

Returns:: the Provider responsible for the backend.
Return type:: Provider

retrieve_job(job_id)¶: get a job from a specific backend, by job id.

retrieve_jobs(job_ids)¶: get a list of jobs from a specific backend, job id

run(circuit, **kwargs)[source]¶

Create and run a job on IonQ’s Simulator Backend.

Parameters:: circuit (QuantumCircuit) – A Qiskit QuantumCircuit object.
Returns:: A reference to the job that was submitted.
Return type:: IonQJob

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

status()¶

Return a backend status object to the caller.

Returns:: the status of the backend.
Return type:: BackendStatus

with_name(name, **kwargs)[source]¶: Helper method that returns this backend with a more specific target system.