Realization of a Sonic Black Hole Analog in a Bose-Einstein Condensate
Realization of a Sonic Black Hole Analog in a Bose-Einstein Condensate
We have created an analog 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 steplike potential accelerates the flow of the condensate to velocities which cross and exceed the speed of sound by an …