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- W3205423629 abstract "The dynamics of sound in a fluid is intrinsically nonlinear. We derive the consequences of this fact for the analogue gravitational field experienced by sound waves, by first describing generally how the nonlinearity of the equation for phase fluctuations back-reacts onto the definition of the background providing the effective space-time metric. Subsequently, we use the the analytical tool of Riemann invariants in one-dimensional motion to derive source terms of the effective gravitational field stemming from nonlinearity. Finally, we show that the consequences of nonlinearity we derive can be observed with Bose-Einstein condensates in the ultracold gas laboratory." @default.
- W3205423629 created "2021-10-25" @default.
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- W3205423629 date "2021-10-21" @default.
- W3205423629 modified "2023-09-27" @default.
- W3205423629 title "Analogue gravitational field from nonlinear fluid dynamics" @default.
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