see for instance the discussions in the following links - Calculating the Log Negativity - #2 by adityab999 and Reduced density matrix of nonadjacent sites - #7 by adityab999, and Retrieve bipartite reduced density matrix - #6 by miles
see for instance the discussions in the following links - Calculating the Log Negativity - #2 by adityab999 and Reduced density matrix of nonadjacent sites - #7 by adityab999, and Retrieve bipartite reduced density matrix - #6 by miles
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