title: Effective temperature and compactivity of a lattice gas under gravity.
abstract: The notion of longitudinal effective temperature and its relation with the Edwards compactivity are investigated in an abstract lattice gas model of granular material compacting under gravity and weak thermal vibration.
authors.affiliation: The Abdus Salam International Centre for Theoretical Physics, Strada Costiera 11, 34100 Trieste, Italy.
authors.forename: Mauro
authors.initials: M
authors.lastname: Sellitto