  We have applied path integral simulations, in combination with new ab initio
based water potentials, to investigate nuclear quantum effects in liquid water.
Because direct ab initio path integral simulations are computationally
expensive, a flexible water model is parameterized by force-matching to density
functional theory-based molecular dynamics simulations. The resulting effective
potentials provide an inexpensive replacement for direct ab inito molecular
dynamics simulations and allow efficient simulation of nuclear quantum effects.
Static and dynamic properties of liquid water at ambient conditions are
presented and the role of nuclear quantum effects, exchange-correlation
functionals and dispersion corrections are discussed in regards to reproducing
the experimental properties of liquid water.
