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Questions tagged [gate-set-tomography]

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What do the gauge freedom and fix the gauge mean in gate set tomography?

Recently, I have seen many papers involving the concept of gauge freedom, but I have not yet got a good understanding of it. For example, in the paper:
karry's user avatar
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Alternatives to process tomography and gate set tomography

I need to characterize an unknown 2-qubit operation. As I understand it, quantum process tomography (QPT) can do this, but will not account for state preparation and measurement (SPAM) errors. On the ...
jchadwick's user avatar
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