Abstract
We investigate the low energy excitations of a dilute atomic Bose gas confined in a harmonic trap of frequency and interacting with repulsive forces. The dispersion law for the elementary excitations is obtained for large numbers of atoms in the trap, to be compared with the prediction of the noninteracting harmonic oscillator model. Here is the number of radial nodes and is the orbital angular momentum. The effects of the kinetic energy pressure are estimated using a sum rule approach. Results are also presented for deformed traps and attractive forces.
- Received 18 March 1996
DOI:https://doi.org/10.1103/PhysRevLett.77.2360
©1996 American Physical Society