Elementary excitation spectrum of a trapped weakly interacting Bose-Einstein condensate
- Department of Physics and Astronomy, The University of Nebraska, 116 Brace Laboratory, Lincoln, Nebraska 68588-0111 (United States)
An analytic expression is presented for the elementary excitation spectrum of the Bose-Einstein condensate of a trapped boson system in the weakly interacting, low-density limit. Explicit analytic formulas for the elementary excitation spectrum are obtained for harmonic-oscillator traps. These formulas provide information about the behavior of the elementary excitation levels as a function of the number of atoms and their interaction strength for a given trap geometry. They also provide a low-density benchmark for results of fully numerical calculations. {copyright} {ital 1997} {ital The American Physical Society}
- DOE Contract Number:
- FG03-96ER14646
- OSTI ID:
- 531786
- Journal Information:
- Physical Review A, Vol. 56, Issue 1; Other Information: PBD: Jul 1997
- Country of Publication:
- United States
- Language:
- English
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