encoder

Transversal encoder utilities for QEC code experiments.

class ColorEncoder5

ColorEncoder5()

Transversal encoder for the [[17,1,5]] 2D color code.

class SteaneEncoder

SteaneEncoder()

Transversal encoder for the [[7,1,3]] Steane code.

class TransversalEncoder

TransversalEncoder(n: int, encoding_qubit: int, encoding_program_text: str | None, stabilizer_generators: list[list[int]], observables: list[list[int]], transversal_flip: bool | None = None)

Base class for transversal quantum error correction encoders.

diagram

diagram(kwargs = {})

Return a timeline-svg diagram of the encoded circuit.

encode_transversally

encode_transversally(program_text: str) -> None

Encode a program transversally by replacing physicalgates with transversal gates.

Transform a program on m qubits into a program on n * m qubits (consisting of n code blocks).

Parameters:

• program_text (str) — The program to encode transversally.

encoding_flow_generators

encoding_flow_generators()

Return the Pauli flow generators for the encoding circuit.

initialize

initialize(program_text: str, encoding_program_text: str | None = None) -> None

Initialize state preparation and apply encoding circuit.

Apply the state preparation program for k qubits, then apply an encoding circuit to encode the state into n qubits.

Parameters:

• program_text (str) — The state preparation program for k qubits. Generally, this should be a simple program that prepares each of the k qubits in a single-qubit state.
• encoding_program_text (optional) — An encoding circuit for a single logical qubit. This should encode a single logical qubit at input self.encoding_qubit into a state of n qubits. If not provided, the encoder will use a noiseless default encoding.

broadcast_targets

broadcast_targets(groups: list[list[stim.GateTarget]], stride: int, offsets: list[int]) -> list[int]

Broadcast gate target groups with a stride and set of offsets.