Example of direct fidelity estimation

[tonybruguier-google]

Adding an example that illustrates the fidelity estimation, as per these two papers

Direct Fidelity Estimation from Few Pauli Measurements
https://arxiv.org/abs/1104.4695

Practical characterization of quantum devices without tomography
https://arxiv.org/abs/1104.3835

[tonybruguier-google]

Happy to withdraw if this is premature.

I've been working with mpharrigan@ but will listen to advice from others, of course.

[Strilanc]

Thanks for the submission! Let's start with some compactification of the code using things we just recently merged.

[tonybruguier-google]

Thanks for the review. I resolved the comments that I felt I had addressed, but one is blocking.

[tonybruguier-google]

I took another look this morning, and I think I can resolve the last comment now.

[tonybruguier-google]

Thanks. PTAL.

[mpharrigan]

coming together, but I have some questions about the implementation, see review comments

[tonybruguier-google]

Thank you both. PTAL.

[tonybruguier-google]

All right. I think all the checks are passing now. If I understand correctly, you are the one with write access who can merge changes (if that PR is indeed ready, otherwise happy to work more on it).

Thanks for your patience and all the guidance.

[CirqBot]

Automerge cancelled: No approved review.

[CirqBot]

Automerge cancelled: No approved review.

[vtomole]

Approving type fixes.

[vtomole]

    if not any(review['state'] == 'APPROVED' for review in review_status):
        return CannotAutomergeError('No approved review.')

How!?

[CirqBot]

Automerge cancelled: No approved review.

[Strilanc]

It's because of a pagination issue.

[CirqBot]

Automerge cancelled: No approved review.

[Strilanc]

(testing)