# Twisted speckle entities inside wavefront reversal mirrors - Nonlinear Sciences > Pattern Formation and Solitons

Abstract: The previously unknown property of the optical speckle pattern reported. Theinterference of a speckle with an oppositely moving phase-conjugated specklewave produces a randomly distributed ensemble of a twisted entities ropessurrounding optical vortex lines. These entities appear in a wide range ofrandomly chosen speckle parameters inside the phase-conjugating mirrorsregardless to an internal physical mechanism of the wavefront reversal. Thesenumerically generated interference patterns are relevant to a Brillouin $\bfPC$-mirrors and to a four-wave mixing $\bf PC$-mirrors based upon laser trappedultracold atomic cloud.

Author: A.Yu.Okulov

Source: https://arxiv.org/