Improve noisy tomography bases #997
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ihincks
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Changelog: New Feature
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This supports caching regular methods of class instances with optionally support for including hashable arg values in cache key.
Adds ability to initialize local preparation and measurement bases with custom noisy states, povms, or instructions for generating the noisy basis matrices.
* Use lru_cache internally for method_cache * remove cache kwarg from method cache and use fixed cache name based on the instances type
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Co-authored-by: Ian Hincks <ian.hincks@gmail.com>
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Summary
Improves
LocalMeasurementBasisandLocalPreparationBasistomography basis classes support for initializing a noisy basis for performing state preparation and measurement error mitigatedStateTomographyandProcessTomographyexperiments. For preparation bases reset noise in a specific qubit, or subset of qubits, can now be input as a quantum channel, and the noisy prepared states are generated by applying the ideal instructions to the noisy initial state. For measurement basis a noisy POVM or quantum channel can be supplied for the 0-index basis (typically the Z-basis), and other bases index POVMs will be generated by applying the ideal inverse instructions to the noisy POVMS.Adds an optional
mitigatorkwarg toPauliMeasurementBasiswhich can be used to initialize the basis with aLocalReadoutMitigatorto construct a readout error mitigated basis for use withStateTomographyandProcessTomographyexperiments. TheLocalReadoutErrorexperiment can be run to obtain theLocalReadoutMitigatorfrom its analysis results.Details and comments