Recovering the equivalence of ensembles II: An Ising chain with competing short and long-range interactions

Autor:	Henriques, Vera B., Salinas, S. R.
Rok vydání:	2015
Předmět:	Condensed Matter - Statistical Mechanics
Druh dokumentu:	Working Paper
Popis:	In a pioneer work, John Nagle has shown that an Ising chain with competing short and long-range interactions displays second and first-order phase transitions separated by a tricritical point. More recently, it has been claimed that Nagle's model provides an example of the inequivalence between canonical and microcanonical calculations. We then revisit Nagle's original solution, as well as the usual formulation of the problem in a canonical ensemble, which lead to the same results. Also, in contrast to recent claims, we show that an alternative formulation in the microcanonical ensemble, with the adequate choice of the fixed thermodynamic extensive variables, leads to equivalent thermodynamic results. Comment: 10 pages, no figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1508.03543 Zobrazit plný text záznamu View this record from Arxiv