Ground State Solutions of Critical Nonlinear Systems

Since the prediction of Bose-Einstein Condensation (abbreviated as BEC) had been validated in experiments 20 years ago, the problems related to BEC have attracted much more attentions. This book considers 3 kinds of critical nonlinear Schrödinger systems (abbreviated as NLSS), that is, usual NLSS, NLSS with magnetic fields and fractional NLSS. There is no compactness as the nonlinear terms in the three NLSS are critical. We mainly rescale and cut off the extremal functions of the corresponding limiting problems, by invariance of rescaling with respect to "gradient-norm" and "critical-norm" and a series of energy estimations to overcome the lack of compactness. Applying variational principle, methord of Nehari manifold, mountain-pass theorem, concentration-compactness principle and maximum principle et al, under proper conditions, the existence results of ground state solutions to the above three NLSS are established.

Zhenyu Guo, male, born in 1982, studied his PhD courses in Thinghua University from September 2013 to June 2016, majoring in Pure Mathematics, and got his Doctor's Degree in June 2016. Now he is a full-time teacher in Liaoning Normal University.