Skip to content

Latest commit

 

History

History
23 lines (14 loc) · 1.9 KB

project2.md

File metadata and controls

23 lines (14 loc) · 1.9 KB
Raw

Project 2 - The Restricted Boltzmann Machine Applied to the Quantum Many Body Problem

See project 1 for general folder structure and build instructions.

New stuff

Mainly, the new additions in the main source code are the following classes:

  • RBMWavefunction: The class implementing the RBM
  • RBMHarmonicOscillatorHamiltonian: The basic Hamiltonian. This is very similar to the HarmonicOscillatorHamiltonian from project 1, and is only a slight simplification from that class.
  • RBMInteractingHamiltonian: The full Hamiltonian implementation.
  • SgdOptimizer: Now a separate class resposible for producing updates to a training algorithm.
  • AdamOptimizer: Extension of the basic SGD, implementing the ADAM optimizer.

In addition, rewrites of the Wavefunction and Hamiltonian base classes have also been made, so as to make project 2 code fit a bit better with the existing code base.

Python bindings

The major addition is the use of cppyy for automatic generation of Python bindings to the C++ backend code. This allows the entierty of the user-code to be written in Python, while all the heavy-lifting is done by C++ behind the scenes. On a relatively modern system, this should be installable simply through pip install cppyy. Do note that this will take about an hour to install, as the backend is quite a large piece of code. The cppyy project is also quite new, and actively developed. As such, some issues might occur with getting it installed properly.

Given that cppyy has been installed successfully, the notebook RBM.ipynb can be loaded and can reproduce all results in the report.

There is also a semi-configurable script in app/rbm_main.cpp which can be used to obtain results. However, no benchmarks are provided for the use of this executable, as everything has been done via the notebook.