iqm.error_reduction_tools.twirling.twirling_modifiers.process_r_gate

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iqm.error_reduction_tools.twirling.twirling_modifiers.process_r_gate#

iqm.error_reduction_tools.twirling.twirling_modifiers.process_r_gate(operation, twirled_circuit, rgen, registers, enforce_readout_twirling_basis=None, twirling_prob=0.5, fix_axes=False)#

Process an R gate: absorb pending operations, then optionally insert a twirling π rotation.

First delegates to take_care_of_pending_operations to commute any accumulated Z and π rotations into the gate parameters. Then, with probability twirling_prob (possibly adjusted by parity or readout twirling constraints), inserts a new π rotation via insert_twirling_pi_rotation. Finally appends the resulting PRX gate to the twirled circuit.

Parameters:

  • operation (CircuitOperation) – The PRX CircuitOperation to process.

  • twirled_circuit (TwirledCircuit) – The new circuit being built.

  • rgen (Generator) – Random number generator for twirling decisions.

  • registers (TrackingRegisters) – Tracking registers for Z, π-rotation state, etc.

  • enforce_readout_twirling_basis (str | None) – If set (‘X’ or ‘I’), overrides twirling_prob to enforce a specific readout twirling outcome on the last SQG.

  • twirling_prob (float) – Probability of inserting a twirling π rotation. Defaults to 0.5.

  • fix_axes (bool) – If True, the twirling π rotation axis is fixed to match the gate’s phase rather than being uniformly random. Defaults to False.

Return type:

None

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