A novel unitary transformation of the Hamiltonian that allows one to partia
lly separate the center-of-mass motion for charged electron-hole systems in
a magnetic field is presented. The two-mode squeezed oscillator states tha
t appear at the intermediate stage of the transformation are used for const
ructing a trial wave function of a two-dimensional charged magnetoexciton.
(C) 2001 MAIK "Nauka / Interperiodica".