Realization of a sonic black hole analogue in a Bose-Einstein condensate

Details Realization of a sonic black hole analogue in a Bose-Einstein condensate Realization of a sonic black hole analogue in a Bose-Einstein condensate

2009-06-07

arxiv.org/abs/0906.1337v2

Phys.Rev.Lett.105:240401,2010

Physics

Condensed Matter

Quantum Gases

Scientific paper

10.1103/PhysRevLett.105.240401

We have created an analogue of a black hole in a Bose-Einstein condensate. In this sonic black hole, sound waves, rather than light waves, cannot escape the event horizon. A step-like potential accelerates the flow of the condensate to velocities which cross and exceed the speed of sound by an order of magnitude. The Landau critical velocity is therefore surpassed. The point where the flow velocity equals the speed of sound is the sonic event horizon. The effective gravity is determined from the profiles of the velocity and speed of sound. A simulation finds negative energy excitations, by means of Bragg spectroscopy.

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