If you sent a laser with superposition of sine and negative sine, they'd cancel. Two beams with sin(x) followed very closely by -sin(x), stirring a condensate would create quantum vortices. The closeness of the beams would mean that there would be a chance for the two lasers to annihilate at any point along the path into the condensate. If you create a lattice with the beams, they would be cancelling in a quantum way, creating random paths for photons to travel. If you draw the function sin(x) and -sin(x) on the graph, rotate the graph, and reproduce the same sin(x) and -sin(x) to the left and right of that wavy up and down curve. The point where the two humps meet is the tube of a torus where photons travel up and down. But they can also travel up a tube between the two touching humps and go left or right. Now reproduce many to the left and right and into the paper, and you have the black hole scrambler. The fact that some are flashing on and off, is denying pathways randomly for photons, and opening paths for the photons. The benefit is that if you send a train of paired entangled photons into the condensate, the scrambler will give you entanglements of any subgroup, so large entanglements are possible, as shown in Malcedena, Susskind, "Cool Horizons of Entangled Black Holes", where the essence of the black hole is its ability to scramble or do this to entangled pairs