Pragma Operations

Pragma operations in qoqo/roqoqo are special types of operations that provide additional metadata or functionality to a quantum program. Unlike standard quantum operations such as gate or measurements, these are not part of the set of operations that can run on all universal quantum computers but these augment, control or guide the execution of quantum programs.

Pragma operations can be used to:

• Annotate a quantum circuit with additional information that is not necessary for execution (e.g. PragmaGlobalPhase, PragmaStartDecompositionBlock)
• Apply operations that lead to a repeated execution of a circuit (PragmaRepeatedMeasurement, PragmaSetNumberOfMeasurements)
• Apply operations that are only available on specific hardware (e.g. PragmaChangeDevice, PragmaSleep)
• Apply operations that are only available on a simulator (e.g. PragmaSetStateVector, PragmaGetStateVector)
• Model noise (e.g. PragmaDamping, PragmaDephasing, see also)
• Model error sources (PragmaOverrotation)

For a full list of available Pragma operations see the API documentation of roqoqo and qoqo.