 Nonlinear Xwave

In physics, a nonlinear Xwave (NLX) is a multidimensional wave that can travel without distortion.
At variance with Xwaves, a nonlinear Xwave does exist in the presence of nonlinearity, and in many cases it selfgenerates from a Gaussian (in any direction) wave packet.
The distinctive feature of an NLX is its "biconical" shape, (see figure) which appears as an "X" in any section plane containing the wave peak and the direction of propagation.
So far, nonlinear Xwaves have been only observed in nonlinear optics experiments, and have been predicted to occur in a variety of nonlinear media including Bose–Einstein condensates.
References and history
 Preliminary experimental results were reported CLEO/QELS conference in 2001 [1]
 The first article appeared in the arXiv:physics archive in 2002 [2]. It was later published in the Physical Review Letters: Phys. Rev. Lett. 90, 170406 (2003) [3] and reported on the theoretical prediction of the existence of nonlinear Xwaves.
 The first experimental results, originally published in the arXiv:physics archive [4], appeared in the Physical Review Letters in 2003: Phys. Rev. Lett. 91, 093904 (2003)[5]
See also
External links
 VINO The Virtual Institute for Nonlinear Optics is a research collaboration devoted to the investigation of Xwaves and conical waves in general.
 Nolinear Xwaves page at the nlo.phys.uniroma1.it website.
Categories: Physics
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