Long-range order in a hard disk model in statistical mechanics
@article{ECP3047, author = {Alexisz Gaál}, title = {Long-range order in a hard disk model in statistical mechanics}, journal = {Electron. Commun. Probab.}, fjournal = {Electronic Communications in Probability}, volume = {19}, year = {2014}, keywords = {spontaneous symmetry breaking; hard-core potential; rigidity estimate}, abstract = {}, pages = {no. 9, 1-9}, issn = {1083-589X}, doi = {10.1214/ECP.v19-3047}, url = {http://ecp.ejpecp.org/article/view/3047}}We model two-dimensional crystals by a configuration space in which every admissible configuration is a hard disk configuration and a perturbed version of some triangular lattice with side length one. In this model we show that, under the uniform distribution, expected configurations in a given box are arbitrarily close to some triangular lattice whenever the particle density is chosen sufficiently high. This choice can be made independent of the box size.