i want to generate Amber force feild of protein for oniom calculations in guassain but it fails can anyone tell how to generate amber force filed with the help of Chimera or Guassain.
Hey @Ariha! Welcome to the forum 
Sounds like you’re trying to do some quantum chemistry 
! The software you’re using is quite different than anything Xanadu offers (circuit-based algorithms rather than traditional quantum chemistry techniques like DFT). Maybe this helps for your task: http://polypargen.com/
If you’d like to learn more about how to do quantum chemistry with PennyLane, check out some of our demos: PennyLane — Results