Interlinking motifs and entropy landscapes of statistically interacting particles

Details Interlinking motifs and entropy landscapes of statistically interacting particles Interlinking motifs and entropy landscapes of statistically interacting particles

2011-08-15

arxiv.org/abs/1108.2990v2

Condens. Matter Phys., 2012, vol. 15, No. 1, 13001: 1-17

Physics

Condensed Matter

Statistical Mechanics

17 pages, 5 tables, 8 figures

Scientific paper

10.5488/CMP.15.13001

The s=1/2 Ising chain with uniform nearest-neighbor and next-nearest-neighbor coupling is used to construct a system of floating particles characterized by motifs of up to six consecutive local spins. The spin couplings cause the assembly of particles which, in turn, remain free of interaction energies even at high density. All microstates are configurations of particles from one of three different sets, excited from pseudo-vacua associated with ground states of periodicities one, two, and four. The motifs of particles and elements of pseudo-vacuum interlink in two shared site variables. The statistical interaction between particles is encoded in a generalized Pauli principle, describing how the placement of one particle modifies the options for placing further particles. In the statistical mechanical analysis arbitrary energies can be assigned to all particle species. The entropy is a function of the particle populations. The statistical interaction specifications are transparently built into that expression. The energies and structures of the particles alone govern the ordering at low temperature. Under special circumstances the particles can be replaced by more fundamental particles with shorter motifs that interlink in only one shared site variable. Structures emerge from interactions on two levels: particles with shapes from coupled spins and long-range ordering tendencies from statistically interacting particles with shapes.

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