title: Director fluctuations in nematic liquid crystals induced by an ultrasonic wave.
abstract: The director-density coupling theory was formulated with two parameters (u(1) and u(2)) to explain the acousto-optic effect in nematic liquid crystals. The assumption that the director is not able to accompany rapid oscillations of the sound wave, so that it actually couples to the time-averaged interaction, renders it effectively a u(1)-independent theory. In this paper, we investigate a route in which the time average is postponed to the end of the calculation. This approach allows us to derive measurable quantities that depend on both u(1) and u(2).
authors.affiliation: Unidade Acadêmica de Garanhuns, Universidade Federal Rural de Pernambuco, Avenida Bom Pastor S/N, 55296-901 Garanhuns, Pernambuco, Brazil.
authors.forename: Caio
authors.initials: C
authors.lastname: Sátiro
authors.forename: Carlindo
authors.initials: C
authors.lastname: Vitoriano
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D019220:High-Energy Shock Waves; D050866:Liquid Crystals / Q000737:chemistry* / Q000528:radiation effects*; D008956:Models, Chemical; D008958:Models, Molecular; D012542:Scattering, Radiation