Quantifying ZPE or tunneling contribution

[Yusef Ahmed]

Hello, 

For a current project, it is important for us to primarily attribute the differences observed in TRPMD simulations to tunneling, and not ZPE. I understand it is difficult to distinguish between different types of nuclear quantum effects, but is there any way in i-PI to quantify ZPE in a simulation? Or quantify the contribution by tunneling in any way? Thank you.