Stable spinning optical solitons in three dimensions
  We introduce spatiotemporal spinning solitons (vortex tori) of the three-dimensional nonlinear Schrodinger equation with focusing cubic and defocusing quintic nonlinearities. The first ever found completely stable spatiotemporal vortex solitons are demonstrated. A general conclusion is that stable spinning solitons are possible as a result of competition between focusing and defocusing nonlinearities. 
D. Mihalache, D. Mazilu, L.-C. Crasovan, I. Towers, A. V. Buryak, B.   A. Malomed, L. Torner, J. P. Torres, and F. Lederer