PHI is a software package for integrating the hierarchy equation of motion (HEOM) to compute the noise- averaged density matrix evolution for a quantum system in contact with a thermal environment. PHI is a multi-threaded program to run on shared memory computers. For more information please see the about page.

For a detailed description of the method and its implementation please see the following paper: Publications Database Open quantum dynamics calculations with the hierarchy equations of motion on parallel computers. Johan Strümpfer and Klaus Schulten. Journal of Chemical Theory and Computation, 8:2808-2816, 2012.


Read the License
Download PHI 1.0 source code
Download PHI 1.0 Linux-x86_64 binary


What is PHI?
PHI 1.0 User’s Guide (pdf) (html)
PHI Tutorial pdf (Required files: phi-tutorial-files.tar.gz)