NVIDIA / NVIDIA/cuQuantum

[Feature] [Unprioritized] CircuitToEinsum: batched expectation values

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@tlubowe is already working on this.

Since Sep 26, 2023.

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Description

Discussed in https://github.com/NVIDIA/cuQuantum/discussions/52
See https://github.com/NVIDIA/cuQuantum/discussions/52#discussioncomment-7108092

As an example, if the workload required many batches of expectation values be calculated for the reduction, that would make a difference.

Regarding "sum of Paulis," associative binary reduction is implemented by many other libraries.

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