[QE-users] Thermodynamic integration in cp.x

[mkondrin]

Dear QE Developers and users!

I have encountered not so clear to me place while reading seminal paper 
of Sugino and Car on melting of silicon (10.1103/PhysRevLett.74.1823). 
To compute the free energy of liquid silicon they in one place used the 
classical system with known free energy as reference and adiabatically 
switches interatomic potential from the one described by Car-Parinello 
dynamics to the classical one described by selected interatomic 
potential (Stillinger-Weber in the paper). I wonder how this can be 
implemented in practice. Is there corresponding switches in cp.x input 
file? Or does the mixing of the classical and quantum systems require 
use of other tools?

Sincerely yours,
M. V. Kondrin