@article{ISI:000177268300004,
 abstract = {We discuss the properties of a one-dimensional lattice model of a driven
system with two species of particles in which the mobility of one
species depends on the density of the other. This model was introduced
by Lahiri and Ramaswamy (Phys. Rev. Lett., 79, 1150 (1997)) in the
context of sedimenting colloidal crystals, and its continuum version was
shown to exhibit an instability arising from linear gradient couplings.
In this paper we review recent progress in understanding the full phase
diagram of the model. There are three phases. In the first, the steady
state can be determined exactly along a representative locus using the
condition of detailed balance. The system shows phase separation of an
exceptionally robust sort, termed strong phase separation, which
survives at all temperatures. The second phase arises in the threshold
case where the first species evolves independently of the second, but
the fluctuations of the first influence the evolution of the second, as
in the passive scalar problem. The second species then shows phase
separation of a delicate sort, in which long-range order coexists with
fluctuations which do not damp down in the large-size limit. This
fluctuation-dominated phase ordering is associated with power law decays
in cluster size distributions and a breakdown of the Porod law. The
third phase is one with a uniform overall density, and along a
representative locus the steady state is shown to have product measure
form. Density fluctuations are transported by two kinematic waves, each
involving both species and coupled at the nonlinear level. Their
dissipation properties are governed by the symmetries of these
couplings, which depend on the overall densities. In the most
interesting case„ the dissipation of the two modes is characterized by
different critical exponents, despite the nonlinear coupling.},
 author = {Ramaswamy, S and Barma, M and Das, D and Basu, A},
 doi = {10.1080/01411590290027045},
 issn = {0141-1594},
 journal = {PHASE TRANSITIONS},
 month = {MAY-JUN},
 number = {4-5, B},
 pages = {363-375},
 times-cited = {5},
 title = {Phase diagram of a two-species lattice model with a linear instability},
 unique-id = {ISI:000177268300004},
 volume = {75},
 year = {2002}
}