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[WIP] Introduce partitioned_contract#97

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LinjianMa wants to merge 42 commits intoITensor:mainITensor/ITensorNetworks.jl:mainfrom LinjianMa:rewrite_contractLinjianMa/ITensorNetworks.jl:rewrite_contractCopy head branch name to clipboard

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Commits on Jun 22, 2023

• Introduce contraction_sequence_to_directed_graph and simplify contraction_sequence_to_graph

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  b256f54

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• Introduce approx_itensornetwork with algorithm ttn_svd

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• Merge branch 'rewrite_contract2' into rewrite_contract

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Commits on Jun 23, 2023

• save changes

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  5505385

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• remove contraction_sequence_to_directed_graph

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• Merge branch 'contraction_graph_fix' into rewrite_contract

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• revert changes

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Commits on Jun 25, 2023

• save changes

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Commits on Jun 26, 2023

• save changes

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Commits on Jul 1, 2023

• Merge branch 'mtfishman:main' into rewrite_contract

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• api change

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Commits on Jul 2, 2023

• Add binary tree structure with top down algorithm

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• Let binary_tree_structure support a vector of inds vectors

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• Merge branch 'recursive_bisection' into rewrite_contract

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Commits on Jul 3, 2023

• implement reference ordering

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• Start on adjacency tree

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• Finish _adjacency_tree, tests to be added

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• Implement the first version of _constrained_minswap_inds_ordering

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• Finish _constrained_minswap_inds_ordering

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• Finish a pass of partitioned_contract

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• Finish _ansatz_tree

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Commits on Jul 4, 2023

• finish _ind_orderings

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• A new partitioned_contract interface

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• Rewrite _recursive_bisection to better handle the case with target_set being a vector of inds

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• Add _roots

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  37cdd5f

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• Fix multiple bugs in partitioned_contract

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Commits on Jul 5, 2023

• Fix bugs

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• 3d cube running working, performance better than the prev implementation

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• Implement contract with partitioned_contract

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• bug fixes & logging & renaming for partitioned_contract

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• randregulargraph works

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• rename approx_contract in examples to partitioned_contract

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Commits on Jul 6, 2023

• Merge upstream

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Commits on Jul 7, 2023

• Add quantum circuit simulation. Performance can be improved

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Commits on Jul 8, 2023

• Add timer to _mps_order

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• Make _ind_orderings more efficient, and add c_in_leaves to _constrained_minswap_inds_ordering

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Commits on Jul 15, 2023

• Merge branch 'mtfishman:main' into rewrite_contract

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• Add qr-svd option for density matrix algorithm

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Commits on Jul 18, 2023

• Fix a big in density matrix alg with qr svd, add args to choose the alg

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• Add bench for tree tn truncate

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Commits on Jul 19, 2023

• Add benchmarks for approx contract

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• change runtest back

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