Susceptibility of the transverse field Ising model on the square lattice

Details Susceptibility of the transverse field Ising model on the square lattice Susceptibility of the transverse field Ising model on the square lattice

2011-01-26

arxiv.org/abs/1101.5077v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figure

Scientific paper

Susceptibility of the transverse field Ising model on the square lattice is calculated numerically in the paramagnetic phase in a wide range of temperatures and transverse fields. An expression with one constant $\pi$, that determines both the critical exponent $\gamma$ and the critical transverse field, compellingly represents the data asymptotically near the quantum critical point, except for a narrow classical region close to the phase transition line, and shows two crossovers as temperature varies.

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