Low Temperature Physics: 29, 501 (2003); https://doi.org/10.1063/1.1542538 (4 pages)
Phonons and rotons of trapped atoms in gravitational field
D.B. Baranov and V.S. Yarunin
Bogoliubov Laboratory of Theoretical Physics Joint Institute for Nuclear Research, Dubna 141980, Russia
Received December 19, 2002
The excitations of trapped atoms with a Bose-Einstein condensate in a trap are determined by the conservation of common phonon and roton numbers of atomic motion, and these properties depend on the presence of gravitational field.