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Dispersive Hydrodynamics of Soliton Condensates for the Korteweg–de Vries Equation
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Dispersive Hydrodynamics of Soliton Condensates for the Korteweg–de Vries Equation
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Journal Article
Dispersive Hydrodynamics of Soliton Condensates for the Korteweg–de Vries Equation
2023
Overview
We consider large-scale dynamics of non-equilibrium dense soliton gas for the Korteweg–de Vries (KdV) equation in the special “condensate” limit. We prove that in this limit the integro-differential kinetic equation for the spectral density of states reduces to the
N
-phase KdV–Whitham modulation equations derived by Flaschka et al. (Commun Pure Appl Math 33(6):739–784, 1980) and Lax and Levermore (Commun Pure Appl Math 36(5):571–593, 1983). We consider Riemann problems for soliton condensates and construct explicit solutions of the kinetic equation describing generalized rarefaction and dispersive shock waves. We then present numerical results for “diluted” soliton condensates exhibiting rich incoherent behaviors associated with integrable turbulence.
Publisher
Springer US,Springer Nature B.V
