Dispersion of elementary excitations is investigated based on the system of quantum hydrodynamics equations for the polarized Bose–Einstein condensate in the third order by the interaction radius. The dispersion law is analytically derived. The contribution of polarization to dispersion of the Bogolyubov mode is investigated. It is demonstrated that a new type of elementary excitations caused by evolution of polarization arises in the Bose–Einstein condensate whose atoms possess an electric dipole moment.
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Russian Acad Sci, Joint Inst High Temp, Ul Izhorskaya 13-19, Moscow 127412, Russia
Natl Res Univ, Moscow Power Engn Inst, Ul Krasnokazarmennaya 14, Moscow 111250, RussiaRussian Acad Sci, Joint Inst High Temp, Ul Izhorskaya 13-19, Moscow 127412, Russia
Bobrov, V. B.
Trigger, S. A.
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Russian Acad Sci, Joint Inst High Temp, Ul Izhorskaya 13-19, Moscow 127412, Russia
Russian Acad Sci, Prokhorov Gen Phys Inst, Ul Vavilova 38, Moscow 119991, RussiaRussian Acad Sci, Joint Inst High Temp, Ul Izhorskaya 13-19, Moscow 127412, Russia
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Russian Acad Sci, Vavilov State Opt Inst, St Petersburg 199053, RussiaRussian Acad Sci, Vavilov State Opt Inst, St Petersburg 199053, Russia
Vysotina, N. V.
Rosanov, N. N.
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Russian Acad Sci, Vavilov State Opt Inst, St Petersburg 199053, Russia
ITMO Univ, St Petersburg 197101, Russia
Russian Acad Sci, Ioffe Physicotech Inst, St Petersburg 194021, RussiaRussian Acad Sci, Vavilov State Opt Inst, St Petersburg 199053, Russia