R. B. Saptsov, “On the instability of a homogeneous state of a weakly interacting Bose gas under external cooling”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2007, Volume 86, Issue 10,Pages <nobr>779

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CONDENSED MATTER

On the instability of a homogeneous state of a weakly interacting Bose gas under external cooling

R. B. Saptsov^ab

^a L. D. Landau Institute for Theoretical Physics, Russian Academy of Sciences
^b Institute of Solid State Research

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.

PACS: 47.50.Gj, 64.60.Ht, 67.40.Bz

Received: 25.10.2007