Supersonic flow of Bose-Einstein condensate past macroscopic obstacles is studied theoretically. It is shown that in the case of large obstacles the Cherenkov cone transforms into a stationary spatial shock wave which consists of a number of spatial dark solitons. Analytical theory is developed for the case of obstacles having a form of a slender body. This theory explains qualitatively the properties of such shocks observed in recent experiments on nonlinear dynamics of condensates of dilute alkali gases.
|Number of pages||5|
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|Early online date||13 Oct 2005|
|Publication status||Published - 6 Feb 2006|