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Abstract: In most classical fluids, shock waves are strongly dissipative, their energybeing quickly lost through viscous damping. But in systems such as coldplasmas, superfluids, and Bose-Einstein condensates, where viscosity isnegligible or non-existent, a fundamentally different type of shock wave canemerge whose behaviour is dominated by dispersion rather than dissipation.Dispersive shock waves are difficult to study experimentally, and analyticalsolutions to the equations that govern them have only been found in onedimension 1D. By exploiting a well-known, but little appreciated,correspondence between the behaviour of superfluids and nonlinear opticalmaterials, we demonstrate an all-optical experimental platform for studying thedynamics of dispersive shock waves. This enables us to observe the propagationand nonlinear response of dispersive shock waves, including the interaction ofcolliding shock waves, in 1D and 2D. Our system offers a versatile and moreaccessible means for exploring superfluid-like and related dispersivephenomena.



Autor: Wenjie Wan, Shu Jia, Jason W. Fleischer

Fuente: https://arxiv.org/







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