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Collective excitations in Bose-Einstein condensates in triaxially anisotropic parabolic traps

András Csordás, Robert Graham

cond-matarXiv:cond-mat/9809002

Abstract

The wave equation of low-frequency density waves in Bose-Einstein condensates at vanishing temperature in arbitrarily anisotropic harmonic traps is separable in elliptic coordinates, provided the condensate can be treated in the Thomas-Fermi approximation. We present a complete solution of the mode functions, which are polynomials of finite order, and their eigenfrequencies which are characterized by three integer quantum numbers.

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