ANTONELLI, PAOLO ARBUNICH, JACK SPARBER, CHRISTOF REGULARIZING NONLINEAR SCHRO ̀ˆDINGER EQUATIONS THROUGH PARTIAL OFF-AXIS VARIATIONS We study a class of focusing nonlinear Schr ̀ˆodinger-type equations derived recently by Dumas, Lannes and Szeftel within the mathematical de- scription of high intensity laser beams [7]. These equations incorporate the possibility of a (partial) off-axis variation of the group velocity of such laser beams through a second order partial differential operator acting in some, but not necessarily all, spatial directions. We investigate the initial value problem for such models and obtain global well-posedness in L2-supercritical situations, even in the case of only partial off-axis dependence. This provides an answer to an open problem posed in [7]. untagged 2019-06-10
    https://indigo.uic.edu/articles/journal_contribution/REGULARIZING_NONLINEAR_SCHRO_DINGER_EQUATIONS_THROUGH_PARTIAL_OFF-AXIS_VARIATIONS/10773161