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Strict site-occupation constraint in 2d Heisenberg models and dynamical mass generation in $QED_3$ at finite temperature

Raoul Dillenschneider·Jean Richert
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Abstract

We study the effect of site occupation in 2d quantum spin systems at finite temperature in a $π$-flux state description at the mean-field level. We impose each lattice site to be occupied by a single SU(2) spin. This is realized by means of a specific prescription. We consider the low-energy Hamiltonian which is mapped into a $QED_3$ Lagrangian of spinons. We compare the dynamically generated mass to the one obtained by means of an average site occupation constraint.

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Raoul Dillenschneider, Jean Richert. 2006-02-21. Strict site-occupation constraint in 2d Heisenberg models and dynamical mass generation in $QED_3$ at finite temperature. https://doi.org/10.1103/physrevb.73.224443

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