Zloshchastiev, Konstantin G.2025-03-032025-03-032022-11Zloshchastiev, K.G. 2022. Sound propagation in cigar-shaped Bose liquids in the Thomas-Fermi approximation: a comparative study between Gross-Pitaevskii and logarithmic models. Fluids. 7(11): 1-5. doi:10.3390/fluids71103582311-5521 (Online)isidoc: 6U5VDhttps://hdl.handle.net/10321/5828A comparative study is conducted of the propagation of sound pulses in elongated Bose liquids and Bose-Einstein condensates in Gross-Pitaevskii and logarithmic models, by means of the Thomas-Fermi approximation. It is demonstrated that in the linear regime the propagation of small density fluctuations is essentially one-dimensional in both models, in the direction perpendicular to the cross section of a liquid’s lump. Under these approximations, it is demonstrated that the speed of sound scales as a square root of particle density in the case of the Gross-Pitaevskii liquid/condensate, but it is constant in a case of the homogeneous logarithmic liquid.5 penQuantum fluidBose-Einstein condensateLogarithmic Schrodinger equationCigar-shaped Bose-Einstein condensateThomas-Fermi approximationGross-Pitaevskii equation4012 Fluid mechanics and thermal engineeringArticle2025-02-1210.3390/fluids7110358