qml.devices.capabilities.DeviceCapabilities

class DeviceCapabilities(operations=<factory>, observables=<factory>, measurement_processes=<factory>, qjit_compatible=False, runtime_code_generation=False, dynamic_qubit_management=False, overlapping_observables=True, non_commuting_observables=False, initial_state_prep=False, supported_mcm_methods=<factory>)

Bases: object

Capabilities of a quantum device.

Attributes

dynamic_qubit_management	Whether the device supports dynamic qubit allocation/deallocation.
initial_state_prep	Whether the device supports initial state preparation.
non_commuting_observables	Whether the device supports measuring non-commuting observables on the same tape.
overlapping_observables	Whether the device supports measuring overlapping observables on the same tape.
qjit_compatible	Whether the device is compatible with qjit.
runtime_code_generation	Whether the device requires run time generation of the quantum circuit.
operations	Operations natively supported by the backend device.
observables	Observables that the device can measure.
measurement_processes	List of measurement processes supported by the backend device.
supported_mcm_methods	List of supported methods of mid-circuit measurements.

dynamic_qubit_management = False

Whether the device supports dynamic qubit allocation/deallocation.

initial_state_prep = False

Whether the device supports initial state preparation.

non_commuting_observables = False

Whether the device supports measuring non-commuting observables on the same tape.

overlapping_observables = True

Whether the device supports measuring overlapping observables on the same tape.

qjit_compatible = False

Whether the device is compatible with qjit.

runtime_code_generation = False

Whether the device requires run time generation of the quantum circuit.

operations

Operations natively supported by the backend device.

observables

Observables that the device can measure.

measurement_processes

List of measurement processes supported by the backend device.

supported_mcm_methods

List of supported methods of mid-circuit measurements.

Methods

filter(finite_shots)	Returns the device capabilities conditioned on the given program features.
from_toml_file(file_path[, runtime_interface])	Loads a DeviceCapabilities object from a TOML file.
supports_observable(observable)	Checks if the given observable is supported by name.
supports_operation(operation)	Checks if the given operation is supported by name.

filter(finite_shots)

Returns the device capabilities conditioned on the given program features.

classmethod from_toml_file(file_path, runtime_interface='pennylane')

Loads a DeviceCapabilities object from a TOML file.

Parameters

• file_path (str) – The path to the TOML file.

• runtime_interface (str) – The runtime execution interface to get the capabilities for. Acceptable values are "pennylane" and "qjit". Use "pennylane" for capabilities of the device’s implementation of Device.execute, and "qjit" for capabilities of the runtime execution function used by a qjit-compiled workflow.

supports_observable(observable)

Checks if the given observable is supported by name.

supports_operation(operation)

Checks if the given operation is supported by name.

code/api/pennylane.devices.capabilities.DeviceCapabilities

 

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