ITensor

ITensor is a library for tensor network calculations, developed by Miles Stoudenmire.

Implementations

• C++: Original implementation
• Julia: Current main version (ITensors.jl)
• Python: My port in progress

Key Features

• Index-based tensor contractions (no manual index tracking)
• Built-in support for DMRG, MPS, and MPO
• Automatic optimization of contraction order