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qiskit-community / povm-toolbox

A toolbox for the implementation of positive operator-valued measures (POVMs).
https://qiskit-community.github.io/povm-toolbox/
Apache License 2.0
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[feature] human-readable representation of `RPMMetadata.pvm_keys` #25

Open mrossinek opened 1 month ago

mrossinek commented 1 month ago

The RPMMetadata.pvm_keys attribute currently simply stores the index of the PVM in the context of the POVMImplementation which generated the parameters.

It would be nice, if we provided a more human-readable format for inspecting this data.

For example, in the case of (LocallyBiased)ClassicalShadows we could properly associate the indices 0, 1, 2 with their respective measurement basis X, Y, Z (possibly a different order) and make a nicer visual representation when inspecting the pvm_keys.

mrossinek commented 1 month ago
With #26 nearing completion, the possible twirling should be taken into account for such a human-readable representation. Maybe we can do smth along the lines of: pvm_idx meaning visual repr.
0 untwirled X X
1 untwirled Y Y
2 untwirled Z Z
3 twirled X x
4 twirled Y y
5 twirled Z z