Sharing a code for the iTDVP?

Question

Dear Matt and Miles,

I recently wrote a code for TDVP of infinite MPSs in part of my research. I see that in the external code section of iTensor, there is only TDVP for finite MPSs, so I thought it might be good to share the iTDVP code, which is here on github: https://github.com/yantaow/iTDVP/tree/master

The code is based on iTensor (C++, v3) and does not require any external libraries. It has a class for infinite MPSs, which can i) bring the iMPS to the canonical form iteratively, ii) compute the quasi-fixed point of the MPO-transfer matrix, and iii) perform the TDVP for iMPS.
This code is also a good starting point to write, for example the VUMPS algorithm, because of its iMPS member functions.

I have benefited greatly from the codes from iTensor, so I thought it might be good to contribute back a tiny bit.

Anyways, please let me know whether you are interested. The final code on github is already in a pretty good shape.

Thanks,
Yantao

Answer 1

Hi Yantao,
Thanks for pointing this out! I just added it to the Codes page of the website (C++ part of the codes page of course). Please let me know if you would like to alter the description text, and I can easily change it for you or you can send a pull request since the ITensor.org website is itself open-source.

Appreciate your contribution -

Miles

Comments

Dear Miles,
My pleasure. I need to say that the code only works after the bug is corrected in
 this post  https://itensor.org/support/2590/bug-report-in-localop-h

This is C++, version 3.1.3

Thanks,
Yantao