English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We show that the quadratic interaction of fundamental and second harmonics ina bulk dispersive medium, combined with self-defocusing cubic nonlinearity,give rise to completely localized spatiotemporal solitons (vortex tori) withvorticity s=1. There is no threshold necessary for the existence of thesesolitons. They are found to be stable against small perturbations if theirenergy exceeds a certain critical value, so that the stability domain occupiesabout 10% of the existence region of the solitons. We also demonstrate that thes=1 solitons are stable against very strong perturbations initially added tothem. However, on the contrary to spatial vortex solitons in the same model,the spatiotemporal solitons with s=2 are never stable.Comment: latex text, 10 ps and 2 jpg figures; Physical Review E, in pres

Stable three-dimensional spinning optical solitons supported by competing quadratic and cubic nonlinearities