surface_sim.circuit_blocks.repetition_code.qec_round

qec_round(model, layout, detectors, anc_reset=True, anc_detectors=None)

Returns stim circuit corresponding to a QEC round of the given model.

Parameters:

model

Noise model for the gates.

layout

Code layout.

detectors

Detector object to use for their definition.

anc_reset

If True, ancillas are reset at the beginning of the QEC round. By default True.

anc_detectors

List of ancilla qubits for which to define the detectors. If None, adds all detectors. By default None.

Notes

This implementation follows two schedules, depending on the layout’s interaction order:

https://doi.org/10.1103/PhysRevApplied.8.034021

or

shallowest interaction order for the rotated surface code where ancillas interact with the data qubit on the left and right in just two two-qubit-gate layers.

It activates all the ancillas in detectors to always build the detectors. As this function should not be used when building encoded circuits with the iterating functions, it does not matter if the detectors are activated or not.