On the instability of a homogeneous state of a weakly interacting Bose gas under external cooling |
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Authors: | R B Saptsov |
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Institution: | 1. Landau Institute for Theoretical Physics, Russian Academy of Sciences, ul. Kosygina 2, Moscow, 119991, Russia 2. Institut für Festk?rperforschung, FZ-Jülich, Germany
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Abstract: | The behavior of a weakly interacting Bose gas with a finite particle lifetime has been studied in the framework of hydrodynamic equations under the conditions of a constant mass and energy inflow in the presence of external cooling. A spatially homogeneous state of such a gas is shown to be unstable with respect to the formation of an inhomogeneous density structure. A possible connection of the present results with experiments 3, 4] is discussed. |
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