# Using Multiple nodes for TEBD.

**URL:** <https://itensor.discourse.group/t/using-multiple-nodes-for-tebd/464>\
**Category:** ITensor Julia Questions\
**Tags:** julia, mps, cluster\
**Created:** [October 13, 2022, 1:06pm UTC](https://itensor.discourse.group/t/using-multiple-nodes-for-tebd/464 "2022-10-13T13:06:32Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![sandipanmanna](https://avatars.discourse-cdn.com/v4/letter/s/ee7513/32.png) [@sandipanmanna](https://itensor.discourse.group/u/sandipanmanna)\
**Post date:** [October 13, 2022, 1:06pm UTC](https://itensor.discourse.group/t/using-multiple-nodes-for-tebd/464/1 "2022-10-13T13:06:32Z")

</div>

Hi!

Is there any option to use multiple nodes for TEBD calculation (in Julia version)? I am not using the in-built TEBD function. I have an MPS & I multiply it with Trotter gates to do the time evolution.Now,gates are applied on even & odd sites alternatively.So, gates in each layer commute among themselves. I guess it is then possible to push the portions of a large MPS into different cluster nodes & apply the gates in a single layer in parallel instead of applying the gates in sequence from an array.

Unfortunately, I can’t find out a simple way to do that. This is not multi threading (which is already being done by Intel MKL/BLAS). I need to access multiple nodes . I looked at [https://github.com/ITensor/ITensorParallel.jl](https://github.com/ITensor/ITensorParallel.jl) & the tutorials. It seems like there is an implementation there but I couldn’t understand how to tune it for my purpose.

Thank you in advance for your kind support. I really appreciate the awesome work being done by the ITensor maintainers to provide us this awesome library.

---

<div class="post-metadata">

**Author:** ![mtfishman](https://yyz2.discourse-cdn.com/free1/user_avatar/itensor.discourse.group/mtfishman/32/11_2.png) [@mtfishman](https://itensor.discourse.group/u/mtfishman)\
**Post date:** [July 12, 2023, 12:48pm UTC](https://itensor.discourse.group/t/using-multiple-nodes-for-tebd/464/3 "2023-07-12T12:48:00Z")

</div>

Unfortunately we don’t have a public version available for that.

Right now, ITensorParallel.jl is focused on parallelizing over sums of Hamiltonians, while what you are asking for is real space parallelization (more akin to [[1301.3494] Real-Space Parallel Density Matrix Renormalization Group](https://arxiv.org/abs/1301.3494), though with TEBD it is even simpler). It is something that we are definitely hoping to do but haven’t had time to implement a public version yet. One of our postdocs Benedikt Kloss who has been contributing to ITensorParallel.jl has a private version of real space parallelized TEBD which maybe he can share but I don’t know what the status of that is.