quantrs2_device/qec/
mitigation.rs

1//! Error Mitigation Strategies and Configurations
2
3use serde::{Deserialize, Serialize};
4use std::collections::HashMap;
5use std::time::Duration;
6
7/// Error mitigation configuration
8#[derive(Debug, Clone, Serialize, Deserialize)]
9pub struct ErrorMitigationConfig {
10    /// Enable zero noise extrapolation
11    pub enable_zne: bool,
12    /// Enable symmetry verification
13    pub enable_symmetry_verification: bool,
14    /// Enable readout correction
15    pub enable_readout_correction: bool,
16    /// Enable dynamical decoupling
17    pub enable_dynamical_decoupling: bool,
18    /// Mitigation strategies
19    pub mitigation_strategies: Vec<MitigationStrategy>,
20    /// ZNE configuration
21    pub zne_config: ZNEConfig,
22    /// Enable error mitigation
23    pub enable_mitigation: bool,
24    /// Mitigation strategies (legacy)
25    pub strategies: Vec<MitigationStrategy>,
26    /// Zero noise extrapolation
27    pub zne: ZNEConfig,
28    /// Readout mitigation
29    pub readout_mitigation: ReadoutMitigationConfig,
30    /// Gate mitigation
31    pub gate_mitigation: GateMitigationConfig,
32    /// Symmetry verification
33    pub symmetry_verification: SymmetryVerificationConfig,
34    /// Virtual distillation
35    pub virtual_distillation: VirtualDistillationConfig,
36}
37
38/// Mitigation strategies
39#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
40pub enum MitigationStrategy {
41    ZeroNoiseExtrapolation,
42    SymmetryVerification,
43    ReadoutErrorMitigation,
44    ReadoutMitigation,
45    GateMitigation,
46    VirtualDistillation,
47    ProbabilisticErrorCancellation,
48    CliffordDeRandomization,
49}
50
51/// Zero noise extrapolation configuration
52#[derive(Debug, Clone, Serialize, Deserialize)]
53pub struct ZNEConfig {
54    /// Noise factors for scaling
55    pub noise_factors: Vec<f64>,
56    /// Extrapolation method
57    pub extrapolation_method: ExtrapolationMethod,
58    /// Circuit folding method
59    pub circuit_folding: CircuitFoldingMethod,
60    /// Enable ZNE
61    pub enable_zne: bool,
62    /// Noise scaling factors
63    pub noise_scaling_factors: Vec<f64>,
64    /// Folding configuration
65    pub folding: FoldingConfig,
66    /// Richardson extrapolation
67    pub richardson: RichardsonConfig,
68}
69
70/// Circuit folding methods for ZNE
71#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
72pub enum CircuitFoldingMethod {
73    GlobalFolding,
74    LocalFolding,
75    UniformFolding,
76    RandomFolding,
77}
78
79/// Extrapolation methods
80#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
81pub enum ExtrapolationMethod {
82    Linear,
83    Polynomial,
84    Exponential,
85    Richardson,
86    AdaptiveExtrapolation,
87}
88
89/// Folding configuration for ZNE
90#[derive(Debug, Clone, Serialize, Deserialize)]
91pub struct FoldingConfig {
92    /// Folding type
93    pub folding_type: FoldingType,
94    /// Global folding
95    pub global_folding: bool,
96    /// Local folding configuration
97    pub local_folding: LocalFoldingConfig,
98    /// Gate-specific folding
99    pub gate_specific: GateSpecificFoldingConfig,
100}
101
102/// Types of folding
103#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
104pub enum FoldingType {
105    Global,
106    Local,
107    GateSpecific,
108    RandomFolding,
109    IdentityInsertion,
110}
111
112/// Local folding configuration
113#[derive(Debug, Clone, Serialize, Deserialize)]
114pub struct LocalFoldingConfig {
115    /// Local folding regions
116    pub regions: Vec<FoldingRegion>,
117    /// Region selection strategy
118    pub selection_strategy: RegionSelectionStrategy,
119    /// Overlap handling
120    pub overlap_handling: OverlapHandling,
121}
122
123/// Folding region definition
124#[derive(Debug, Clone, Serialize, Deserialize)]
125pub struct FoldingRegion {
126    /// Start qubit
127    pub start_qubit: usize,
128    /// End qubit
129    pub end_qubit: usize,
130    /// Start time
131    pub start_time: f64,
132    /// End time
133    pub end_time: f64,
134}
135
136/// Region selection strategies
137#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
138pub enum RegionSelectionStrategy {
139    Random,
140    HighErrorRate,
141    CriticalPath,
142    Uniform,
143    Adaptive,
144    Automatic,
145}
146
147/// Overlap handling strategies
148#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
149pub enum OverlapHandling {
150    Ignore,
151    Merge,
152    Prioritize,
153    Exclude,
154}
155
156/// Gate-specific folding configuration
157#[derive(Debug, Clone, Serialize, Deserialize)]
158pub struct GateSpecificFoldingConfig {
159    /// Gate folding rules
160    pub folding_rules: HashMap<String, GateFoldingRule>,
161    /// Priority ordering
162    pub priority_ordering: Vec<String>,
163    /// Error rate weighting
164    pub error_rate_weighting: bool,
165    /// Folding strategies (alias for folding_rules)
166    pub folding_strategies: HashMap<String, GateFoldingRule>,
167    /// Default folding strategy
168    pub default_strategy: DefaultFoldingStrategy,
169    /// Prioritized gates (alias for priority_ordering)
170    pub prioritized_gates: Vec<String>,
171}
172
173/// Default folding strategies
174#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
175pub enum DefaultFoldingStrategy {
176    Identity,
177    Inverse,
178    Decomposition,
179    Random,
180    None,
181}
182
183/// Gate folding rule
184#[derive(Debug, Clone, Serialize, Deserialize)]
185pub struct GateFoldingRule {
186    /// Folding factor
187    pub folding_factor: f64,
188    /// Folding probability
189    pub probability: f64,
190    /// Replacement strategy
191    pub replacement: GateReplacementStrategy,
192}
193
194/// Gate replacement strategies
195#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
196pub enum GateReplacementStrategy {
197    Identity,
198    Inverse,
199    Decomposition,
200    Equivalent,
201}
202
203/// Richardson extrapolation configuration
204#[derive(Debug, Clone, Serialize, Deserialize)]
205pub struct RichardsonConfig {
206    /// Enable Richardson extrapolation
207    pub enable_richardson: bool,
208    /// Order of extrapolation
209    pub order: usize,
210    /// Stability check
211    pub stability_check: bool,
212    /// Error estimation
213    pub error_estimation: ErrorEstimationConfig,
214}
215
216/// Error estimation configuration
217#[derive(Debug, Clone, Serialize, Deserialize)]
218pub struct ErrorEstimationConfig {
219    /// Estimation method
220    pub method: ErrorEstimationMethod,
221    /// Bootstrap samples
222    pub bootstrap_samples: usize,
223    /// Confidence level
224    pub confidence_level: f64,
225}
226
227/// Error estimation methods
228#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
229pub enum ErrorEstimationMethod {
230    Bootstrap,
231    Jackknife,
232    CrossValidation,
233    AnalyticalEstimate,
234}
235
236/// Readout mitigation configuration
237#[derive(Debug, Clone, Serialize, Deserialize)]
238pub struct ReadoutMitigationConfig {
239    /// Enable readout mitigation
240    pub enable_mitigation: bool,
241    /// Mitigation methods
242    pub methods: Vec<ReadoutMitigationMethod>,
243    /// Calibration configuration
244    pub calibration: ReadoutCalibrationConfig,
245    /// Matrix inversion
246    pub matrix_inversion: MatrixInversionConfig,
247    /// Tensored mitigation
248    pub tensored_mitigation: TensoredMitigationConfig,
249}
250
251/// Readout mitigation methods
252#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
253pub enum ReadoutMitigationMethod {
254    CompleteMitigation,
255    TensoredMitigation,
256    LocalMitigation,
257    ClusterMitigation,
258    PartialMitigation,
259}
260
261/// Readout calibration configuration
262#[derive(Debug, Clone, Serialize, Deserialize)]
263pub struct ReadoutCalibrationConfig {
264    /// Calibration frequency
265    pub frequency: CalibrationFrequency,
266    /// Calibration states
267    pub states: Vec<CalibrationState>,
268    /// Quality metrics
269    pub quality_metrics: Vec<QualityMetric>,
270}
271
272/// Calibration frequency options
273#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
274pub enum CalibrationFrequency {
275    BeforeEachExperiment,
276    Periodic(Duration),
277    OnDemand,
278    Adaptive,
279}
280
281/// Calibration state definition
282#[derive(Debug, Clone, Serialize, Deserialize)]
283pub struct CalibrationState {
284    /// State label
285    pub label: String,
286    /// Preparation circuit
287    pub preparation: Vec<String>,
288    /// Expected result
289    pub expected_result: Vec<f64>,
290}
291
292/// Quality metrics for calibration
293#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
294pub enum QualityMetric {
295    Fidelity,
296    CrossTalk,
297    TemporalStability,
298    SpatialUniformity,
299}
300
301/// Matrix inversion configuration
302#[derive(Debug, Clone, Serialize, Deserialize)]
303pub struct MatrixInversionConfig {
304    /// Inversion method
305    pub method: InversionMethod,
306    /// Regularization
307    pub regularization: RegularizationConfig,
308    /// Numerical stability
309    pub stability: NumericalStabilityConfig,
310}
311
312/// Matrix inversion methods
313#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
314pub enum InversionMethod {
315    DirectInversion,
316    PseudoInverse,
317    IterativeInversion,
318    RegularizedInversion,
319}
320
321/// Regularization configuration
322#[derive(Debug, Clone, Serialize, Deserialize)]
323pub struct RegularizationConfig {
324    /// Regularization type
325    pub regularization_type: RegularizationType,
326    /// Regularization parameter
327    pub parameter: f64,
328    /// Adaptive regularization
329    pub adaptive: bool,
330}
331
332/// Regularization types
333#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
334pub enum RegularizationType {
335    L1,
336    L2,
337    ElasticNet,
338    Tikhonov,
339    None,
340}
341
342/// Numerical stability configuration
343#[derive(Debug, Clone, Serialize, Deserialize)]
344pub struct NumericalStabilityConfig {
345    /// Condition number threshold
346    pub condition_threshold: f64,
347    /// Pivoting strategy
348    pub pivoting: PivotingStrategy,
349    /// Scaling
350    pub scaling: bool,
351}
352
353/// Pivoting strategies
354#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
355pub enum PivotingStrategy {
356    Partial,
357    Complete,
358    Rook,
359    None,
360}
361
362/// Tensored mitigation configuration
363#[derive(Debug, Clone, Serialize, Deserialize)]
364pub struct TensoredMitigationConfig {
365    /// Mitigation groups
366    pub groups: Vec<MitigationGroup>,
367    /// Group formation strategy
368    pub group_strategy: GroupFormationStrategy,
369    /// Cross-talk handling
370    pub crosstalk_handling: CrosstalkHandling,
371}
372
373/// Mitigation group definition
374#[derive(Debug, Clone, Serialize, Deserialize)]
375pub struct MitigationGroup {
376    /// Group qubits
377    pub qubits: Vec<usize>,
378    /// Group label
379    pub label: String,
380    /// Independent mitigation
381    pub independent: bool,
382}
383
384/// Group formation strategies
385#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
386pub enum GroupFormationStrategy {
387    Topology,
388    ErrorRate,
389    Connectivity,
390    Manual,
391    Adaptive,
392}
393
394/// Cross-talk handling methods
395#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
396pub enum CrosstalkHandling {
397    Ignore,
398    Model,
399    Compensate,
400    Avoid,
401}
402
403/// Gate mitigation configuration
404#[derive(Debug, Clone, Serialize, Deserialize)]
405pub struct GateMitigationConfig {
406    /// Enable gate mitigation
407    pub enable_mitigation: bool,
408    /// Gate-specific configurations
409    pub gate_configs: HashMap<String, GateSpecificConfig>,
410    /// Twirling configuration
411    pub twirling: TwirlingConfig,
412    /// Randomized compiling
413    pub randomized_compiling: RandomizedCompilingConfig,
414}
415
416/// Gate-specific mitigation configuration
417#[derive(Debug, Clone, Serialize, Deserialize)]
418pub struct GateSpecificConfig {
419    /// Error model
420    pub error_model: GateErrorModel,
421    /// Mitigation method
422    pub mitigation_method: GateMitigationMethod,
423    /// Compensation parameters
424    pub compensation: CompensationParameters,
425}
426
427/// Gate error models
428#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
429pub enum GateErrorModel {
430    Depolarizing,
431    Coherent,
432    Incoherent,
433    Composite,
434    Custom(String),
435}
436
437/// Gate mitigation methods
438#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
439pub enum GateMitigationMethod {
440    PulseOptimization,
441    CompositePulses,
442    DynamicalDecoupling,
443    ErrorCorrection,
444    VirtualZ,
445}
446
447/// Compensation parameters
448#[derive(Debug, Clone, Serialize, Deserialize)]
449pub struct CompensationParameters {
450    /// Phase corrections
451    pub phase_corrections: HashMap<String, f64>,
452    /// Amplitude corrections
453    pub amplitude_corrections: HashMap<String, f64>,
454    /// Timing corrections
455    pub timing_corrections: HashMap<String, f64>,
456}
457
458/// Twirling configuration
459#[derive(Debug, Clone, Serialize, Deserialize)]
460pub struct TwirlingConfig {
461    /// Enable twirling
462    pub enable_twirling: bool,
463    /// Twirling type
464    pub twirling_type: TwirlingType,
465    /// Twirling groups
466    pub groups: Vec<TwirlingGroup>,
467    /// Randomization strategy
468    pub randomization: RandomizationStrategy,
469}
470
471/// Types of twirling
472#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
473pub enum TwirlingType {
474    Pauli,
475    Clifford,
476    Gaussian,
477    Custom(String),
478}
479
480/// Twirling group definition
481#[derive(Debug, Clone, Serialize, Deserialize)]
482pub struct TwirlingGroup {
483    /// Group elements
484    pub elements: Vec<String>,
485    /// Group operation
486    pub operation: String,
487    /// Sampling distribution
488    pub distribution: SamplingDistribution,
489}
490
491/// Sampling distributions for twirling
492#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
493pub enum SamplingDistribution {
494    Uniform,
495    Weighted,
496    Adaptive,
497    Custom(String),
498}
499
500/// Randomization strategies
501#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
502pub enum RandomizationStrategy {
503    FullRandomization,
504    PartialRandomization,
505    StructuredRandomization,
506    AdaptiveRandomization,
507}
508
509/// Randomized compiling configuration
510#[derive(Debug, Clone, Serialize, Deserialize)]
511pub struct RandomizedCompilingConfig {
512    /// Enable randomized compiling
513    pub enable_rc: bool,
514    /// Compilation strategies
515    pub strategies: Vec<CompilationStrategy>,
516    /// Gate replacement rules
517    pub replacement_rules: HashMap<String, Vec<String>>,
518    /// Randomization level
519    pub randomization_level: RandomizationLevel,
520}
521
522/// Compilation strategies
523#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
524pub enum CompilationStrategy {
525    GateReplacement,
526    CircuitReordering,
527    ParameterRandomization,
528    HybridApproach,
529}
530
531/// Randomization levels
532#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
533pub enum RandomizationLevel {
534    Low,
535    Medium,
536    High,
537    Adaptive,
538}
539
540/// Symmetry verification configuration
541#[derive(Debug, Clone, Serialize, Deserialize)]
542pub struct SymmetryVerificationConfig {
543    /// Enable symmetry verification
544    pub enable_verification: bool,
545    /// Symmetry types
546    pub symmetry_types: Vec<SymmetryType>,
547    /// Verification protocols
548    pub protocols: Vec<VerificationProtocol>,
549    /// Tolerance settings
550    pub tolerance: ToleranceSettings,
551}
552
553/// Symmetry types for verification
554#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
555pub enum SymmetryType {
556    UnitarySymmetry,
557    HamiltonianSymmetry,
558    StateSymmetry,
559    OperatorSymmetry,
560}
561
562/// Verification protocols
563#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
564pub enum VerificationProtocol {
565    DirectVerification,
566    RandomizedBenchmarking,
567    ProcessTomography,
568    ShadowEstimation,
569}
570
571/// Tolerance settings for verification
572#[derive(Debug, Clone, Serialize, Deserialize)]
573pub struct ToleranceSettings {
574    /// Symmetry tolerance
575    pub symmetry_tolerance: f64,
576    /// Statistical tolerance
577    pub statistical_tolerance: f64,
578    /// Confidence level
579    pub confidence_level: f64,
580}
581
582/// Virtual distillation configuration
583#[derive(Debug, Clone, Serialize, Deserialize)]
584pub struct VirtualDistillationConfig {
585    /// Enable virtual distillation
586    pub enable_distillation: bool,
587    /// Distillation protocols
588    pub protocols: Vec<DistillationProtocol>,
589    /// Resource requirements
590    pub resources: ResourceRequirements,
591    /// Quality metrics
592    pub quality_metrics: Vec<DistillationQualityMetric>,
593}
594
595/// Distillation protocols
596#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
597pub enum DistillationProtocol {
598    Standard,
599    Accelerated,
600    ResourceOptimized,
601    FaultTolerant,
602}
603
604/// Resource requirements for distillation
605#[derive(Debug, Clone, Serialize, Deserialize)]
606pub struct ResourceRequirements {
607    /// Auxiliary qubits
608    pub auxiliary_qubits: usize,
609    /// Measurement rounds
610    pub measurement_rounds: usize,
611    /// Classical processing
612    pub classical_processing: ProcessingRequirements,
613}
614
615/// Processing requirements
616#[derive(Debug, Clone, Serialize, Deserialize)]
617pub struct ProcessingRequirements {
618    /// Memory requirements
619    pub memory_mb: usize,
620    /// Computation time
621    pub computation_time: Duration,
622    /// Parallel processing
623    pub parallel_processing: bool,
624}
625
626/// Quality metrics for distillation
627#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
628pub enum DistillationQualityMetric {
629    Fidelity,
630    SuccessProbability,
631    ResourceEfficiency,
632    FaultTolerance,
633}
634
635/// Probabilistic error cancellation configuration
636#[derive(Debug, Clone, Serialize, Deserialize)]
637pub struct PECConfig {
638    /// Enable PEC
639    pub enable_pec: bool,
640    /// Quasi-probability decomposition
641    pub quasi_probability: QuasiProbabilityConfig,
642    /// Sampling strategy
643    pub sampling: SamplingConfig,
644    /// Optimization settings
645    pub optimization: PECOptimizationConfig,
646}
647
648/// Quasi-probability configuration
649#[derive(Debug, Clone, Serialize, Deserialize)]
650pub struct QuasiProbabilityConfig {
651    /// Decomposition method
652    pub method: DecompositionMethod,
653    /// Basis operations
654    pub basis_operations: Vec<String>,
655    /// Normalization
656    pub normalization: bool,
657}
658
659/// Decomposition methods
660#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
661pub enum DecompositionMethod {
662    Optimal,
663    Greedy,
664    Heuristic,
665    MachineLearning,
666}
667
668/// Sampling configuration for PEC
669#[derive(Debug, Clone, Serialize, Deserialize)]
670pub struct SamplingConfig {
671    /// Sampling method
672    pub method: SamplingMethod,
673    /// Sample size
674    pub sample_size: usize,
675    /// Importance sampling
676    pub importance_sampling: bool,
677}
678
679/// Sampling methods
680#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
681pub enum SamplingMethod {
682    MonteCarlo,
683    ImportanceSampling,
684    StratifiedSampling,
685    AdaptiveSampling,
686}
687
688/// PEC optimization configuration
689#[derive(Debug, Clone, Serialize, Deserialize)]
690pub struct PECOptimizationConfig {
691    /// Objective function
692    pub objective: ObjectiveFunction,
693    /// Constraints
694    pub constraints: Vec<OptimizationConstraint>,
695    /// Optimization algorithm
696    pub algorithm: OptimizationAlgorithm,
697}
698
699/// Objective functions for PEC
700#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
701pub enum ObjectiveFunction {
702    MinimizeVariance,
703    MinimizeBias,
704    MaximizeEfficiency,
705    BalancedObjective,
706}
707
708/// Optimization constraints
709#[derive(Debug, Clone, Serialize, Deserialize)]
710pub struct OptimizationConstraint {
711    /// Constraint type
712    pub constraint_type: String,
713    /// Constraint value
714    pub value: f64,
715    /// Tolerance
716    pub tolerance: f64,
717}
718
719/// Optimization algorithms
720#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
721pub enum OptimizationAlgorithm {
722    GradientDescent,
723    Newton,
724    QuasiNewton,
725    EvolutionaryAlgorithm,
726    BayesianOptimization,
727}
728
729// Default implementations
730
731impl Default for FoldingConfig {
732    fn default() -> Self {
733        Self {
734            folding_type: FoldingType::Global,
735            global_folding: true,
736            local_folding: LocalFoldingConfig::default(),
737            gate_specific: GateSpecificFoldingConfig::default(),
738        }
739    }
740}
741
742impl Default for LocalFoldingConfig {
743    fn default() -> Self {
744        Self {
745            regions: vec![],
746            selection_strategy: RegionSelectionStrategy::Automatic,
747            overlap_handling: OverlapHandling::Merge,
748        }
749    }
750}
751
752impl Default for GateSpecificFoldingConfig {
753    fn default() -> Self {
754        Self {
755            folding_rules: HashMap::new(),
756            priority_ordering: vec![],
757            error_rate_weighting: false,
758            folding_strategies: HashMap::new(),
759            default_strategy: DefaultFoldingStrategy::Identity,
760            prioritized_gates: vec![],
761        }
762    }
763}
quantrs2_device/qec/mitigation.rs

quantrs2_device/qec/
mitigation.rs
