Module contraction 

Contraction and operations for TreeTN.

This module provides methods for:

• Replacing internal indices with fresh IDs (sim_internal_inds)
• Contracting TreeTN to tensor (contract_to_tensor)
• Zip-up contraction (contract_zipup)
• Naive contraction (contract_naive)
• Validation (validate_ortho_consistency)

Structs

ContractionOptions

Options for the generic contract function.

Enums

ContractionMethod

Contraction method for TreeTN operations.

Functions

contract

Contract two TreeTNs using the specified method.

contract_naive_to_treetn

Contract two TreeTNs using naive contraction, then decompose back to TreeTN.