Check-in analog experiment tutorial

[BichengYing]

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- Coverage   99.57%   99.57%   -0.01%     
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[eliottrosenberg]

Thanks, @BichengYing!

[dstrain115]

I think we want to use cirq.GridDeviceMetadat.qubit_pairs rather than this function. It's possible that certain couplers have been turned off, which would be noted in the metadata but not in this function.

[dstrain115]

A short descriptive paragraph as to what readout fidelity is and why we want to check it might be good here.

[dstrain115]

I think it would be good to explain this in the context of analog experiments. Either here or at the top, we should include the fact that we are using this as an example of an experiment that utilizes analog frequencies.

[dstrain115]

I think it would be good for each of these sections to tie this more clearly in to the functionality we are trying to showcase. e.g. For this example, we make a staggered field. However, for your example you will want to create your own frequency trajectory, and this is how.

[dstrain115]

I find this wording strange. Usually an exercise is a problem that a student must complete, but, here, we have completed it ourselves.

[dstrain115]

Not being familiar with the Vanilla KZ experiment, I have no idea what these plots mean or why they are here. I think some explanation is needed.

[dstrain115]

This seems like it is shown in backwards order. Should we show the simple plot with two qubits first, then show how it can be generalized to more qubits?

[dstrain115]

I think this description of the exercises should be expanded if we actually want people to attempt them.

[dstrain115]

This is the whole point of this tutorial is to explain how to use the analog classes, and it's not really even mentioned. I would spend some time explaining aexp.AnalogTrajectory.from_sparse_trajectory and its uses.

[dstrain115]

I think this tutorial should be reworked a bit. The purpose of the tutorial is to explain the analog functionality, not run the Vanilla KZ experiment, so I think we should focus more on the analog tools and how to use them.