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Results tagged with pauli-group
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user 12547
Questions about or related to the Pauli group.
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Efficient way to calculate trace of product of Pauli string and matrix?
We have $\text{Tr}(PM)=\sum_{ij}P_{ij}M_{ij}$
and $P$ is very sparse: it has sparsity $\frac{1}{2^N}$.
So if you store $P$ in a sparse format, you can compute $\text{Tr}(PM)$ efficiently by summing ov …
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