3 papers
nlin.PS2026
`Relativistic' propagation of instability fronts in nonlinear Klein-Gordon equation dynamics
A. M. Kamchatnov
We consider propagation of instability fronts in conservative nonlinear wave systems by the Whitham method. Whitham modulation equations for periodic solutions of the generalized K…
cond-mat.quant-gas2025
Supersonic Flow Past an Obstacle in a Quasi-Two-Dimensional Lee-Huang-Yang Quantum Fluid
G. H. dos Santos, L. F. Calazans de Brito, A. Gammal +1
A supersonic flow past an obstacle can generate a rich variety of wave excitations. This paper investigates, both analytically and numerically, two types of excitations generated b…
nlin.PS2025
Theory of dispersive shock waves induced by the Raman effect in optical fibers
D. V. Shaykin, A. M. Kamchatnov
We develop the theory of dispersive shock waves in optical fibers for the case of long-distance propagation of optical pulses, when the small Raman effect stabilizes the profile of…