Oscillations and interactions of dark and dark?bright solitons in Bose?Einstein condensates
Solitons are encountered in a wide range of nonlinear systems, from water channels to optical fibres. They have also been observed in Bose?Einstein condensates, but only now have such ?ultracold solitons? been made to live long enough for their dynamical properties to be studied in detail.
AFP - At least 18 people were killed and 22 injured on Saturday when dozens of homes in northern Cairo collapsed after being hit by a massive rockslide, Egyptian emergency services said.