(docs): intra device scheduling

[ritajitmajumdar1]

Summary

This notebook shows an example of intra-device scheduling where more than one circuit is executed in parallel on a hardware, and the result for each is obtained by marginalising.

Details and comments

[ritajitmajumdar1]

The first version only shows executing two random circuits in parallel and obtaining the individual probability distributions by marginalising over the other.

Immediate next step: show how to do the same when we want to calculate expectation value of observables instead of distributions.

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