which tools can provide on the fly quantum forces

B武

B武 2015-01-30

Hi every one

I use materials studio to reproduce the work in this paper.Here is the linkhttp://www.sciencedirect.com/science/article/pii/S1540748902802814

The author uses on-the-fly quantum forces in MD.And my questions are

(1)what does on-the-fly quantum forces means?

(2)Which tools can provide such on-the-fly quantum forces in materials studio?

Any help will be appreciated.

Sincerely