We consider a fluid of oriented hard squares on a two-dimensional strip. When two squares cannot pass each other, the equilibrium behaviour is similar to that of repulsive cores on a line. However, when the strip is wide enough that two squares can pass, but not three, an exact solution shows that there is already an indication of a thermodynamic singularity coming into being at around 70 per cent of close packing volume.
ASJC Scopus subject areas
- Molecular Biology
- Condensed Matter Physics
- Physical and Theoretical Chemistry