PMID- 24320282 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20140806 LR - 20131210 IS - 1089-7690 (Electronic) IS - 0021-9606 (Linking) VI - 139 IP - 18 DP - 2013 Nov 14 TI - Computer simulation of liquid-vapor coexistence of confined quantum fluids. PG - 184505 LID - 10.1063/1.4829769 [doi] AB - The liquid-vapor coexistence (LV) of bulk and confined quantum fluids has been studied by Monte Carlo computer simulation for particles interacting via a semiclassical effective pair potential Veff(r) = VLJ + VQ, where VLJ is the Lennard-Jones 12-6 potential (LJ) and VQ is the first-order Wigner-Kirkwood (WK-1) quantum potential, that depends on beta = 1∕kT and de Boer's quantumness parameter Lambda=h/sigma radicalmepsilon, where k and h are the Boltzmann's and Planck's constants, respectively, m is the particle's mass, T is the temperature of the system, and sigma and epsilon are the LJ potential parameters. The non-conformal properties of the system of particles interacting via the effective pair potential Veff(r) are due to Lambda, since the LV phase diagram is modified by varying Lambda. We found that the WK-1 system gives an accurate description of the LV coexistence for bulk phases of several quantum fluids, obtained by the Gibbs Ensemble Monte Carlo method (GEMC). Confinement effects were introduced using the Canonical Ensemble (NVT) to simulate quantum fluids contained within parallel hard walls separated by a distance Lp, within the range 2sigma