title: A dissipative attractor in the spatiotemporal collapse of ultrashort light pulses.
abstract: Spatiotemporal self-focusing in nonlinear lossy media pushes ultrashort pulses towards a universal, non-solitary and non-conical light bullet wave state defined by the medium solely, and characterized by maximum energy losses. Its stationary propagation relies on a balance between nonlinear losses and the refuelling effect of self-focusing. No balancing gain is required for stationarity. These purely lossy dissipative light-bullets can explain many aspects of the filamentary dynamics in nonlinear media with anomalous dispersion.
authors.affiliation: Departamento de Física Aplicada, Universidad Politécnica de Madrid, Rios Rosas 21, ES-28003, Spain. miguelangel.porras@upm.es
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Porras