Neural Network Quantum State Tomography.
A Quantum Calculator Used for Many-body Eigenstate Reconstruction
QuCumber is a program that reconstructs an unknown quantum wavefunction from a set of measurements. The measurements should consist of binary counts; for example, the occupation of an atomic orbital, or angular momentum eigenvalue of a qubit. These measurements form a training set, which is used to train a stochastic neural network called a Restricted Boltzmann Machine. Once trained, the neural network is a reconstructed representation of the unknown wavefunction underlying the measurement data. It can be used for generative modelling, i.e. producing new instances of measurements, and to calculate estimators not contained in the original data set.
QuCumber is developed by the Perimeter Institute Quantum Intelligence Lab (PIQuIL).
QuCumber implements unsupervised generative modelling with a two-layer RBM. Each layer is a number of binary stochastic variables (with values 0 or 1). The size of the visible layer corresponds to the input data, i.e. the number of qubits. The size of the hidden layer is a hyperparameter, varied to systematically control representation error.
Currently, quantum state reconstruction can be performed on pure states with either positive-definite or complex wavefunctions. In the case of a positive-definite wavefunction, data is only required in one basis. For complex wavefunctions, measurement data in additional bases will be required to train the wavefunction.
Documentation can be found here.
See "QuCumber: wavefunction reconstruction with neural networks" https://arxiv.org/abs/1812.09329
These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.
If you're on Windows, you will have to install PyTorch manually; instructions can be found on their website: pytorch.org.
You can install the latest stable version of QuCumber, along with its dependencies,
pip install qucumber
If, for some reason,
pip fails to install PyTorch, you can find installation
instructions on their website. Once that's done you should be able to install
pip as above.
QuCumber supports Python 3.5 and newer stable versions.
Installing the bleeding-edge version
If you'd like to install the most upto date, but potentially unstable version, you can clone the repository's develop branch and then build from source like so:
git clone email@example.com:PIQuIL/QuCumber.git cd ./QuCumber git checkout develop python setup.py install
Please read CONTRIBUTING.md for details on how to contribute to the project, and the process for submitting pull requests to us.
QuCumber is licensed under the Apache License Version 2.0, this includes almost all files in this repo. However, some miscellaneous files may be licensed differently. See LICENSE for more details.
Matthew J. S. Beach, Isaac De Vlugt, Anna Golubeva, Patrick Huembeli, Bohdan Kulchytskyy, Xiuzhe Luo, Roger G. Melko, Ejaaz Merali, Giacomo Torlai, "QuCumber: wavefunction reconstruction with neural networks", arXiv:1812.09329, 2018.
We thank M. Albergo, G. Carleo, J. Carrasquilla, D. Sehayek, and L. Hayward Sierens for many helpful discussions.
We thank the Perimeter Institute for the continuing support of PIQuIL.
Thanks to Nick Mercer for creating our awesome logo. You can check out more of Nick's work by visiting his portfolio on Behance!
Release history Release notifications | RSS feed
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
|Filename, size||File type||Python version||Upload date||Hashes|
|Filename, size qucumber-1.1.0-cp35-none-any.whl (60.1 kB)||File type Wheel||Python version cp35||Upload date||Hashes View|
|Filename, size qucumber-1.1.0-cp36-none-any.whl (60.1 kB)||File type Wheel||Python version cp36||Upload date||Hashes View|
|Filename, size qucumber-1.1.0-cp37-none-any.whl (60.1 kB)||File type Wheel||Python version cp37||Upload date||Hashes View|
|Filename, size qucumber-1.1.0.tar.gz (31.7 kB)||File type Source||Python version None||Upload date||Hashes View|
Hashes for qucumber-1.1.0-cp35-none-any.whl
Hashes for qucumber-1.1.0-cp36-none-any.whl
Hashes for qucumber-1.1.0-cp37-none-any.whl