# Tabulated potential tables

**URL:** <https://gromacs.bioexcel.eu/t/tabulated-potential-tables/11852>\
**Category:** User discussions\
**Tags:** forcefield\
**Created:** [April 1, 2025, 2:59pm UTC](https://gromacs.bioexcel.eu/t/tabulated-potential-tables/11852 "2025-04-01T14:59:44Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Eliza](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/eliza/32/4492_2.png) [@Eliza](https://gromacs.bioexcel.eu/u/Eliza)\
**Post date:** [April 1, 2025, 2:59pm UTC](https://gromacs.bioexcel.eu/t/tabulated-potential-tables/11852/1 "2025-04-01T14:59:44Z")

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GROMACS version: 2025  
GROMACS modification: Yes/No  
Here post your question  
Are tabulated potential tables implemented in 2025 release?  
Can I use Bham potential?

Thanks

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**Author:** ![hess](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/hess/32/416_2.png) [@hess](https://gromacs.bioexcel.eu/u/hess)\
**Post date:** [April 1, 2025, 3:28pm UTC](https://gromacs.bioexcel.eu/t/tabulated-potential-tables/11852/2 "2025-04-01T15:28:32Z")

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If you are asking about tabulated non-bonded potentials, the answer is no. No Buckingham either. We want to reimplement tabulated potentials, but we need to find the resources.

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**Author:** ![Eliza](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/eliza/32/4492_2.png) [@Eliza](https://gromacs.bioexcel.eu/u/Eliza)\
**Post date:** [April 2, 2025, 4:55pm UTC](https://gromacs.bioexcel.eu/t/tabulated-potential-tables/11852/3 "2025-04-02T16:55:48Z")

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Thank you hess.

Sorry to hear that.

So, if I use 2018, can I use tables where I combine Bham and LJ?

If yes, may I have examples of tables and a brief description of how to use them?

Thanks  
Eliza

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**Author:** ![hess](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/hess/32/416_2.png) [@hess](https://gromacs.bioexcel.eu/u/hess)\
**Post date:** [April 3, 2025, 1:42pm UTC](https://gromacs.bioexcel.eu/t/tabulated-potential-tables/11852/4 "2025-04-03T13:42:06Z")

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With tables, in 2018, you only have two functions and parameters. So you can not easily combine LJ and Bham with several parameters. But if you only have one or a few sets of Bham parameters, you can do those with a few tables.

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**Author:** ![Eliza](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/eliza/32/4492_2.png) [@Eliza](https://gromacs.bioexcel.eu/u/Eliza)\
**Post date:** [April 6, 2025, 12:15pm UTC](https://gromacs.bioexcel.eu/t/tabulated-potential-tables/11852/5 "2025-04-06T12:15:20Z")

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Thanks again hess!

I am wondering what happens with the non-bonded parameters that I do not define? Are they computed somehow? eg with amber99

Thanks

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**Author:** ![hess](https://dub1.discourse-cdn.com/flex017/user_avatar/gromacs.bioexcel.eu/hess/32/416_2.png) [@hess](https://gromacs.bioexcel.eu/u/hess)\
**Post date:** [April 7, 2025, 8:18am UTC](https://gromacs.bioexcel.eu/t/tabulated-potential-tables/11852/6 "2025-04-07T08:18:50Z")

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What do you mean? Lennard-Jones parameters for non-same atom type pairs? Those are computed using the combination rule chosen.