Module error_correction 

Quantum error correction codes and decoders

This module provides comprehensive quantum error correction functionality including:

• Pauli operators and strings
• Stabilizer codes (repetition, 5-qubit, Steane)
• Surface codes and topological codes
• Syndrome decoders (lookup table, MWPM, ML)
• Color codes and concatenated codes
• LDPC and hypergraph product codes
• Real-time error correction
• Logical gate synthesis
• Adaptive threshold estimation

Modules

lookup

Lookup table decoder for stabilizer codes.

min_matching

Minimum-weight perfect matching via bitmask dynamic programming.

mwpm

MWPM (Minimum-Weight Perfect Matching) decoder for the rotated surface code.

real_time

Real-time error correction with hardware integration

union_find

Union-Find decoder for the rotated surface code.

Structs

AdaptiveConfig

Configuration for adaptive threshold estimation

AdaptiveThresholdEstimator

Adaptive threshold estimator for error correction

ColorCode

Color code

ConcatenatedCode

Concatenated quantum error correction codes

EnvironmentSensitivity

Sensitivity to environmental factors

EnvironmentalConditions

Environmental conditions affecting error rates

ErrorObservation

Observation of an error and correction attempt

ErrorPropagationAnalysis

Analysis of how errors propagate through logical gates

ErrorPropagationPath

Path of error propagation through a logical gate

HypergraphProductCode

Hypergraph product codes for quantum LDPC

LogicalCircuitResources

Resource requirements for a logical circuit

LogicalCircuitSynthesizer

Logical circuit synthesis for fault-tolerant quantum computing

LogicalGateOp

Logical gate operation that can be applied to encoded quantum states

LogicalGateSynthesizer

Logical gate synthesis engine

LookupDecoder

Lookup table decoder.

MLDecoder

Machine learning decoder for quantum error correction

MWPMDecoder

Minimum Weight Perfect Matching decoder for surface codes (legacy).

MwpmSurfaceDecoder

MWPM decoder for the rotated planar surface code.

NoiseModel

Noise model for quantum errors

PauliFrame

Classical Pauli frame tracker for fault-tolerant circuits.

PauliString

Multi-qubit Pauli operator

PerformanceTracker

Performance tracking for adaptive threshold

PhysicalGateSequence

Sequence of physical gates that implement part of a logical gate

QuantumLDPCCode

Quantum Low-Density Parity-Check (LDPC) codes

RotatedSurfaceCode

A rotated planar surface code of distance d.

StabilizerCode

Stabilizer code definition

SurfaceCode

Surface code lattice

ThresholdRecommendation

Threshold recommendation result

TimingConstraints

Timing constraints for fault-tolerant gate implementation

ToricCode

Toric code (generalization of surface code on torus)

UnionFindDecoder

Union-Find decoder for the rotated planar surface code.

Enums

Color

Color enumeration for face coloring

MLModelType

Machine learning model types

OptimizationPass

Optimization pass for logical circuits

Pauli

Pauli operator representation

SynthesisStrategy

Strategy for synthesizing logical gates

ThresholdEstimationAlgorithm

Algorithm for threshold estimation

Traits

SyndromeDecoder

Trait for syndrome decoders

Functions

min_weight_perfect_matching

Compute a minimum-weight perfect matching on n labeled vertices using bitmask DP.