Vortex transmutation.
Using group theory arguments and numerical simulations, we demonstrate the possibility of changing the vorticity or topological charge of an individual vortex by means of the action of a system possessing a discrete rotational symmetry of finite order. We establish on theoretical grounds a "transmutation pass" determining the conditions for this phenomenon to occur and numerically analyze it in the context of two-dimensional optical lattices. An analogous approach is applicable to the problems of Bose-Einstein condensates in periodic potentials.
Ferrando
Albert
A
Departament d'Optica, Universitat de València, Dr. Moliner, 50, E-46100 Burjassot (València), Spain.
Zacarés
Mario
M
García-March
Miguel-Angel
MA
Monsoriu
Juan A
JA
de Córdoba
Pedro Fernández
PF