Funding for this research was provided by:
Lembaga Pengelolaan Dana Pendidikan (Indonesia Endowment Fund for Education) (S-34/LPDP.3/2017, S-5405/LPDP.3/2015)
Journal title: Journal of Physics A: Mathematical and Theoretical
Article type: paper
Article title: Variational approximations using Gaussian ansatz, false instability, and its remedy in nonlinear Schrödinger lattices
Copyright information: © 2018 IOP Publishing Ltd
Publication dates
Date received: 2018-05-27
Date accepted: 2018-09-27
Online publication date: 2018-10-31