@article{ISI:000343306400004, abstract = {Active nematics are conceptually the simplest orientationally ordered phase of self-driven particles, but have proved to be a perennial source of surprises. We show here through numerical solution of coarse-grained equations for the order parameter and density that the growth of the active nematic phase from the isotropic phase is necessarily accompanied by a clumping of the density. The growth kinetics of the density domains is shown to be faster than the 13 law expected for variables governed by a conservation law. Other results presented include the suppression of density fluctuations in the stationary ordered nematic by the imposition of an orienting field. We close by posing some open questions.}, article-number = {20130364}, author = {Mishra, Shradha and Puri, Sanjay and Ramaswamy, Sriram}, doi = {10.1098/rsta.2013.0364}, eissn = {1471-2962}, issn = {1364-503X}, journal = {PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES}, month = {NOV 28}, number = {2029, SI}, title = {Aspects of the density field in an active nematic}, unique-id = {ISI:000343306400004}, volume = {372}, year = {2014} }