High-density limit of quasi-two-dimensional dipolar Bose gas |
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Authors: | Volodymyr Pastukhov |
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Institution: | Ivan Franko National University of Lviv, Department for Theoretical Physics, 12 Drahomanov St., Lviv, Ukraine |
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Abstract: | We consider a simple model of the quasi-two-dimensional dipolar Bose gas confined in the one-dimensional square well potential. All dipoles are assumed to be oriented along the confining axis. By means of hydrodynamic approach it is shown that the general structure of the low-lying excitations can be analyzed exactly. We demonstrate that the problem significantly simplifies in the high-density limit for which the density profile in the confined direction as well as the leading-order contribution to the ground-state energy and spectrum of elementary excitations are calculated. The low-temperature result for the damping rate of the phonon mode is also presented. |
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Keywords: | Quasi-two-dimensional dipolar Bose system Bogoliubov spectrum Landau damping |
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