@article{ISI:000423435000007,
 abstract = {We consider a collection of self-driven apolar particles on a substrate
that organize into an active nematic phase at sufficiently high density
or low noise. Using the dynamical renormalization group, we
systematically study the two-dimensional fluctuating ordered phase in a
coarse-grained hydrodynamic description involving both the nematic
director and the conserved density field. In the presence of noise, we
show that the system always displays only quasi-long-ranged
orientational order beyond a crossover scale. A careful analysis of the
nonlinearities permitted by symmetry reveals that activity is
dangerously irrelevant over the linearized description, allowing giant
number fluctuations to persist although now with strong finite-size
effects and a nonuniversal scaling exponent. Nonlinear effects from the
active currents lead to power-law correlations in the density field,
thereby preventing macroscopic phase separation in the thermodynamic
limit.},
 article-number = {012707},
 author = {Shankar, Suraj and Ramaswamy, Sriram and Marchetti, M. Cristina},
 doi = {10.1103/PhysRevE.97.012707},
 eissn = {2470-0053},
 issn = {2470-0045},
 journal = {PHYSICAL REVIEW E},
 month = {JAN 29},
 number = {1},
 orcid-numbers = {Shankar, Suraj/0000-0002-4615-975X},
 times-cited = {9},
 title = {Low-noise phase of a two-dimensional active nematic system},
 unique-id = {ISI:000423435000007},
 volume = {97},
 year = {2018}
}