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We report the observation of quantum reflection from a narrow, attractive,potential using bright solitary matter-waves formed from a 85Rb Bose-Einsteincondensate. We create narrow potentials using a tightly focused, red-detunedlaser beam, and observe reflection of up to 25% of the atoms, along with thetrapping of atoms at the position of the beam. We show that the observedreflected fraction is much larger than theoretical predictions for a narrowGaussian potential well; a more detailed model of bright soliton propagation,accounting for the generic presence of small subsidiary intensity maxima in thered-detuned beam, suggests that these small intensity maxima are the cause ofthis enhanced reflection.

Quantum reflection of bright solitary matter-waves from a narrow attractive potential