The virial theorem and ground state energy estimates of nonlinear Schrodinger equations in R2 with square root and saturable nonlinearities in nonlinear optics
Academic Article
Overview
Research
Identity
Additional Document Info
Other
View All
Overview
abstract
2017, Springer-Verlag GmbH Germany. The virial theorem is a nice property for the linear Schrdinger equation in atomic and molecular physics as it gives an elegant ratio between the kinetic and potential energies and is useful in assessing the quality of numerically computed eigenvalues. If the governing equation is a nonlinear Schrdinger equation with power-law nonlinearity, then a similar ratio can be obtained but there seems to be no way of getting any eigenvalue estimates. It is surprising as far as we are concerned that when the nonlinearity is either square-root or saturable nonlinearity (not a power-law), one can develop a virial theorem and eigenvalue estimates of nonlinear Schrdinger (NLS) equations in R2 with square-root and saturable nonlinearity, respectively. Furthermore, we show here that the eigenvalue estimates can be used to obtain the 2nd order term (which is of order ln ) of the lower bound of the ground state energy as the coefficient of the nonlinear term tends to infinity.
