On the Validity of the Dynamical Mean-Field Approximation for Studying the Two-Dimensional Hubbard Model on a Square Lattice

<table>Specific heat <i>C</i> versus temperature <i>T</i> for <i>n</i> = 0.5 with (a) <i>U</i>/<i>t</i> = 4, (b) <i>U</i>/<i>t</i> = 8, and (c) <i>U</i>/<i>t</i> = 12. The full lines are QMC results taken from [<a href="/journals/acmp/2010/487381/#B7">7</a>] and the dashed lines are our results calculated by DMFA.</table>

Advances in Condensed Matter Physics

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Figure 2

Figure 2: On the Validity of the Dynamical Mean-Field Approximation for Studying the Two-Dimensional Hubbard Model on a Square Lattice 