rborrelli / ITensor

A C++ library for efficient tensor network calculations. Fork with non-Hermitian dynamics for HEOM.

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}
}

This fork implements a new Arnoldi methos to apply an exponential operator for non-Hermitian cases.