Scaling and density of Lee-Yang zeros in the four-dimensional Ising model

The scaling behaviour of the edge of the Lee--Yang zeroes in the four dimensional Ising model is analyzed. This model is believed to belong to the same universality class as the

\phi^4_4

model which plays a central role in relativistic quantum field theory. While in the thermodynamic limit the scaling of the Yang--Lee edge is not modified by multiplicative logarithmic corrections, such corrections are manifest in the corresponding finite--size formulae. The asymptotic form for the density of zeroes which recovers the scaling behaviour of the susceptibility and the specific heat in the thermodynamic limit is found to exhibit logarithmic corrections too. The density of zeroes for a finite--size system is examined both analytically and numerically.

Ising model
scaling: finite size
lattice field theory: susceptibility
partition function: 0
thermodynamics
numerical calculations: Monte Carlo

References(44)

Figures(0)

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