Lattice hard spheres

Lattice hard spheres refers to athermal lattice gas models, in which pair of sites separated by less than some short distance Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle \sigma } cannot be simultaneously occupied.

Basically the differences with the standard lattice gas model (Ising model) are:

• An occupied site excludes the occupation of some of the neighboring sites.

• No energy interactions between pairs of occupied sites are considered.