Messirdi, Bekkai; Ghomari, Kaoutar; Vũ Ngọc, San
(Asymptotic Analysis, 2013-01-01)
This article reviews the Birkhoff–Gustavson normal form theorem (BGNF) near an equilibrium point of a quantum Hamiltonian. The BGNF process is thereafter used to investigate the spectrum of Schrödinger operators in the 1: ...