ЖЭТФ, Том 122,
Вып. 2,
стр. 258 (Август 2002)
(Английский перевод - JETP,
Vol. 95, No 2,
p. 221,
August 2002
доступен on-line на www.springer.com
)
NONLINEARITY EFFECTS IN WAVE PROPAGATION IN MULTICOMPONENT BOSE-EINSTEIN CONDENSATES
Mazets I.E., Orlenko E.V., Matisov B.G.
Поступила в редакцию: 22 Января 2002
PACS: 03.75.Fi
We consider a spinor Bose-Einstein condensate in its polar ground state. We analyze magnetization waves of a finite amplitude and show that their nonlinear coupling to density waves dramatically changes the dependence of the frequency on the wavenumber. On the contrary, the density wave propagation is much less modified by nonlinearity effects. A similar phenomenon in a miscible two-component condensate is also studied.
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