Jump to content

X-wave

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by Claudioconti (talk | contribs) at 20:25, 17 December 2006 (added See also section with Nonlinear X-waves). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

In physics, X-waves are localized solutions of the wave equation that travel at a constant velocity along a given direction.

X-waves can be sound, electromagnetic or gravitational waves. They are build as a non-monochromatic superposition of Bessel beams.

X-waves carry infinite energy and travel superluminally (for electromagnetic waves). Finite energy realizations have been observed in various frameworks.


References and history

  • X-waves solutions of the wave-equation have been introduced in 1992 by Lu and Greenleaf within the framework of ultrasonic progation:

J. Lu and J. F. Greenleaf, "Nondiffracting X waves- exact solutions to free-space scalar wave equation and their infinite realizations," IEEE Trans. Ultrason. Ferroelectr. Freq. Control 39, 19-31 (1992)

See also

Nonlinear X-waves

Stub icon

This physics-related article is a stub. You can help Wikipedia by expanding it.

Retrieved from "https://en.wikipedia.org/w/index.php?title=X-wave&oldid=94946026"