Elementary excitation spectrum of a trapped weakly interacting Bose-Einstein condensate

Journal Article · Tue Jul 01 00:00:00 EDT 1997 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.56.570· OSTI ID:531786

Marinescu, M; Starace, A F ^[1]

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1. 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

Related Subjects

66 PHYSICS
BOSE-EINSTEIN CONDENSATION
EXCITED STATES
EXCITATION
ANALYTICAL SOLUTION
HARMONIC OSCILLATORS