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We consider a quantum analogue of black holes and white holes usingBose-Einstein condensates. The model is described by the nonlinear Schrodingerequation with a 'stream flow' potential, that induces a spatial translation tostanding waves. We then mainly consider the dynamics of dark solitons in ablack hole or white hole flow analogue and their interactions with the eventhorizon. A reduced equation describing the position of the dark solitons wasobtained using variational method. Through numerical computations andcomparisons with the analytical approximation we show that solitons can passthrough black hole horizons even though they will break up into severalsolitons after the collision. In the interaction with a white hole horizon, weshow that solitons either pass through the horizon or will be destroyed by it.

Black holes will break up solitons and white holes may destroy them