Anisotropic ordering in a two-temperature lattice gas

Anisotropic ordering in a two-temperature lattice gas

Ordering in lattice gases at low temperature

We show that for generic short-range classical lattice gas models the third law of thermodynamics holds-entropy goes to zero with temperature. The most fundamental aspect of low-temperature matter is its highly ordered (crystalline) structure, which distinguishes it from the fluid state and is necessary for most of the characteristic features of solids. Attempts to discover the causes of this o...

1 99 6 Novel Quenched Disorder Fixed Point in a Two - Temperature Lattice Gas

We investigate the effects of quenched randomness on the universal properties of a two-temperature lattice gas. The disorder modifies the dynamical transition rates of the system in an anisotropic fashion, giving rise to a new fixed point. We determine the associated scaling form of the structure factor, quoting critical exponents to two-loop order in an expansion around the upper critical dime...

Temperature determination from the lattice gas model.

Determination of temperature from experimental data has become important in searches for critical phenomena in heavy ion collisions. Widely used methods are ratios of isotopes (which rely on chemical and thermal equilibrium), population ratios of excited states etc. Using the lattice gas model we propose a new observable: nch/Z where nch is the charge multiplicity and Z is the charge of the fra...

Temporal meson correlators at finite temperature on quenched anisotropic lattice ∗

We study charmonium correlators at finite temperature in quenched anisotropic lattice QCD. The smearing technique is applied to enhance the low energy part of the correlator. We use two analysis procedures: the maximum entropy method for extraction of the spectral function without assuming specific form, as an estimate of the shape of spectral function, and the χ fit assuming typical forms as q...