Affiliation:
1. Flatiron Institute
2. University of California, Irvine
Abstract
ITensor is a system for programming tensor network calculations with an interface modeled on
tensor diagrams, allowing users to focus on the connectivity of a tensor network without manually bookkeeping tensor indices. The ITensor interface rules out common programming errors and enables rapid prototyping of algorithms. After discussing the philosophy behind the ITensor approach, we show examples of each part of the interface including Index objects, the ITensor product operator, tensor factorizations, tensor storage types, algorithms for matrix product state (MPS) and matrix product operator (MPO) tensor networks, quantum number conserving block sparse tensors, and the NDTensors library. We also review publications that have used ITensor for quantum many-body physics and for other areas where tensor networks are increasingly applied. To conclude we discuss promising features and optimizations to be added in the future.
Funder
National Science Foundation
Simons Foundation
United States Department of Energy
Subject
Fluid Flow and Transfer Processes,Otorhinolaryngology,Sociology and Political Science,History,Philosophy,General Mathematics,General Medicine,Political Science and International Relations,Sociology and Political Science,History,Sociology and Political Science,History,Communication,Cultural Studies,Religious studies,History,Biomaterials,Visual Arts and Performing Arts,Cultural Studies,Social Psychology
Cited by
353 articles.
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