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Updated: Aug 18, 2026

Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
Quantum simulation of the heat capacity of water
Wataru Shinoda1, Motoyuki Shiga
1Research Institute for Computational Sciences, National Institute of Advanced Industrial Science and Technology (AIST), Central 2, 1-1-1, Umezono, Tsukuba, Ibaraki 305-8568, Japan. w.shinoda@aist.go.jp
Abstract:
Path integral molecular dynamics simulations have been carried out to evaluate heat capacities of water in gas, liquid, and solid phases. For convergence, a 100-ps simulation run with a large path integral variable (P approximately 128) was required even by using the double-centroid virial heat capacity estimator. For all states, the quantum corrections to the heat capacities are significantly large. The calculated heat capacities for vapor and ice I(h) agreed excellently with experimental data, while that for liquid was less than the experimental value by approximately 20% due to the limit of the SPC/F potential model.
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