Discrete-symmetry vortices as angular Bloch modes

Details Discrete-symmetry vortices as angular Bloch modes Discrete-symmetry vortices as angular Bloch modes

2004-11-29

arxiv.org/abs/nlin/0411059v1

Nonlinear Sciences

Pattern Formation and Solitons

4 pages, 2 figures

Scientific paper

10.1103/PhysRevE.72.036612

The most general form for symmetric modes of nonlinear discrete-symmetry systems with nonlinearity depending on the modulus of the field is presented. Vortex solutions are demonstrated to behave as Bloch modes characterized by an angular Bloch momentum associated to a periodic variable, periodicity being fixed by the order of discrete point-symmetry of the system. The concept of angular Bloch momentum is thus introduced to generalize the usual definition of angular momentum to cases where O(2) -symmetry no longer holds. The conservation of angular Bloch momentum during propagation is demonstrated.

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