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Homepage: http://itensor.org/

An efficient and flexible C++ library for performing tensor network calculations.

The foundation of the library is the Intelligent Tensor or ITensor. Contracting ITensors is no harder than multiplying scalars: matching indices automatically find each other and contract. This makes it easy to transcribe tensor network diagrams into correct, efficient code.

Installation instructions can be found in the INSTALL file.

Citation

If you use ITensors.jl in your work, for now please cite the arXiv preprint:

@misc{fishman2020itensor,
    title={The \mbox{ITensor} Software Library for Tensor Network Calculations},
    author={Matthew Fishman and Steven R. White and E. Miles Stoudenmire},
    year={2020},
    eprint={2007.14822},
    archivePrefix={arXiv},
    primaryClass={cs.MS}
}

ITensor's Projects

idmrg icon idmrg

The infinite-size variant of the Density Matrix Renormalization Group (iDMRG) algorithm, implemented in ITensor.

itensor icon itensor

A C++ library for efficient tensor network calculations

itensoragp.jl icon itensoragp.jl

Adiabatically evolve matrix product states (MPS) using matrix produect operator (MPO) representations of the adiabatic gauge potential (AGP).

itensornetworkad.jl icon itensornetworkad.jl

Tools for using AD to optimize tensor networks, built on top of ITensor and AutoHOOT.

itensors.jl icon itensors.jl

A Julia library for efficient tensor computations and tensor network calculations

itensorsgpu.jl icon itensorsgpu.jl

Extension of the Intelligent Tensors library to take advantage of fast GPU-based linear algebra

itensortdvp.jl icon itensortdvp.jl

Time dependent variational principle (TDVP) of MPS based on ITensors.jl.

tdvp icon tdvp

ITensor implementation of the time dependent variational principle (TDVP) algorithm for finite MPS

website icon website

Source code for the website at itensor.org

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