A. Csordas et al., SEMICLASSICAL WAVE-FUNCTIONS AND ENERGY-LEVELS OF BOSE-CONDENSED GASES IN SPHERICALLY SYMMETRICAL TRAPS, Physical review. A, 56(6), 1997, pp. 5179-5182
The WKB approximation for the Bogoliubov equations of the quasiparticl
e excitations in Bose gases with a condensate is worked out in the cas
e of spherically symmetric trap potentials on the basis of the resulti
ng quantization rule. The excitation spectrum is calculated numericall
y and also analytically in certain limiting cases. [S1050-2947(97)0801
1-6].