title: Gas-liquid coexistence for the boson square-well fluid and the (4)He binodal anomaly.
abstract: The binodal of a boson square-well fluid is determined as a function of the particle mass through a quantum Gibbs ensemble Monte Carlo algorithm devised by R. Fantoni and S. Moroni [J. Chem. Phys. (to be published)]. In the infinite mass limit we recover the classical result. As the particle mass decreases, the gas-liquid critical point moves at lower temperatures. We explicitly study the case of a quantum delocalization de Boer parameter close to the one of (4)He. For comparison, we also determine the gas-liquid coexistence curve of (4)He for which we are able to observe the binodal anomaly below the λ-transition temperature.
authors.affiliation: Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari Venezia, Calle Larga Santa Marta DD2137, I-30123 Venezia, Italy.
authors.forename: Riccardo
authors.initials: R
authors.lastname: Fantoni
mesh_terms: D000465:Algorithms; D005740:Gases; D006371:Helium; D009010:Monte Carlo Method; D044367:Phase Transition; D011789:Quantum Theory; D013696:Temperature
chemical_list: D005740:Gases; D006371:Helium