@article{ISI:000176907500041,
 abstract = {We construct the hydrodynamic equations for suspensions of
self-propelled particles (SPPs) with spontaneous orientational order,
and make a number of striking, testable predictions: (i) Nematic SPP
suspensions are always absolutely unstable at long wavelengths. (ii) SPP
suspensions support novel propagating modes at long wavelengths,
coupling orientation, flow, and concentration. (iii) In a wave number
regime accessible only in low Reynolds number systems such as bacteria,
polar-ordered suspensions are invariably convectively unstable. (iv) The
variance in the number N of particles, divided by the mean <N>, diverges
as <N>(2/3) in polar-ordered SPP suspensions.},
 article-number = {058101},
 author = {Simha, RA and Ramaswamy, S},
 doi = {10.1103/PhysRevLett.89.058101},
 issn = {0031-9007},
 journal = {PHYSICAL REVIEW LETTERS},
 month = {JUL 29},
 number = {5},
 times-cited = {505},
 title = {Hydrodynamic fluctuations and instabilities in ordered suspensions of
self-propelled particles},
 unique-id = {ISI:000176907500041},
 volume = {89},
 year = {2002}
}