title: Absence of simulation evidence for critical depletion in slit pores.
abstract: Recent Monte Carlo simulation studies of a Lennard-Jones fluid confined to a mesoscopic slit pore have reported evidence of "critical depletion" in the pore local number density near the liquid-vapor critical point. In this Brief Report we demonstrate that the observed depletion effect is in fact a simulation artifact arising from small systematic errors associated with the use of long range corrections for the potential truncation. Owing to the large near-critical compressibility, these errors lead to significant changes in the pore local number density. We suggest ways of avoiding similar problems in future studies of confined fluids.
authors.affiliation: Department of Physics and Astronomy, The University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom.
authors.forename: N B
authors.initials: NB
authors.lastname: Wilding
authors.forename: M
authors.initials: M
authors.lastname: Schoen