Uni10 Documentation

Introduction

Uni10 is an open-source C++ library designed for the development of tensor network algorithms. Programming tensor network algorithms is tedious and prone to errors. The task of keeping track of tensor indices while performing contraction of a complicated tensor network can be daunting. It is desirable to have a platform that provides bookkeeping capability and optimization.

This software distinguishes itself from other available software solutions by providing the following advantages:

• Fully implemented in C++.
• Aimed toward applications in tensor network algorithms.
• Provides basic tensor operations with an easy-to-use interface.
• Provides a Network class to process and store the details of the graphical representations of the networks.
• Implements a heuristic algorithm to search for an optimal pairwise contraction order based on the available computation and memory resources.
• Provides a collection of Python wrappers which interact with the compiled C++ library to take advantage of the Python language for better code readability and faster prototyping, without sacrificing the speed.
• Provides behind-the-scene optimization and acceleration.

Copyright and Changes

See GPL and LGPL for copyright conditions.

See Release Notes for release notes and changes.

Installation

Download

The latest Uni10 source code can be downloaded from github.

Requirements

• cmake version > 2.8.12
• C++ compiler
• BLAS and LAPACK libraries and header files
• HDF5 library and header
• Doxygen (for documentation)
• Swig (for Python wrapper)

Build

To build Un10, follow the following steps:

1. Create a build directory
2. Use Cmake to generate makefile
3. Build library and exmamples
4. Install library and examples (May require root access)

Examples

Using system c++, blas and lapack

> mkdir build
> cd build
> cmake </path/to/uni10/>
> make
> sudo make install

The installation path defaults to /usr/local/uni10.

To override the default path, use CMAKE_INSTALL_PREFIX :

> cmake -DCMAKE_INSTALL_PREFIX=</installation_path> </path/to/uni10/>

To use MKL and Intel compiler:

> cmake -DBUILD_WITH_MKL=on -DBUILD_WITH_INTEL_COMPILER=on </path/to/uni10/>

If cmake failes to find blas and lapack, specify the libraries by

> cmake -DBLAS_LIBRARIES=</path/to/blas> -DLAPACK_LIBRARIES=</path/to/lapack> </path/to/uni10/>

Build Options

Option	Description (Default value)
BUILD_WITH_MKL	Use Intel MKL for lapack and blas (off)
BUILD_WITH_INTEL_COMPILERS	Use Intel C++ compiler (off)
BUILD_PYTHON_WRAPPER	Build pyUni10 wrapper (off)
BUILD_EXAMPLES	Build C++ examples (on)
BUILD_DOC	Build Documentation (off)
BUILD_ARPACK_SUPPORT	Build ARPACK wrapper (off)
CMAKE_INSTALL_PREFIX	Installation location (/usr/local/uni10)

Developers and Maintainers

• Ying-Jer Kao (National Taiwan University)
• Pochung Chen (National Tsing-Hua University)
• Yun-Hsuan Chou (National Taiwan University)
• Chen-Yen Lai (University of Chicago, Merced)

Alumni

• Yun-Da Hsieh (Code Base, GPU)
• Tama Ma (CMake)
• Sukhbinder Singh (Matlab Wrapper)

Help and Bug Reports

Please report bugs on github by creating issues.

Known issues

• CMake generated Xcode project not working

To Do

• GUI for generating network files
• Full GPU support