Published January 1, 2013
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DENSITY WAVES IN DIPOLAR BOSE-EINSTEIN CONDENSATES
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Density waves in cigar-shaped dipolar Bose-Einstein condensates are analysed by variational means and we show analytically how the dipole-dipole interaction between the atoms generates a roton-maxon excitation spectrum. A simple model is used to derive the effective equations which describe the emergence of the density waves.
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