Fig. 3: Experimental observation of flow with repulsive or attractive potentials. | Nature Communications

Fig. 3: Experimental observation of flow with repulsive or attractive potentials.

From: Gravitational caustics in an atom laser

Fig. 3

a–d A repulsive potential is centered h = 78(1) μm below the trapped BEC. e–h An attractive potential is centered h = 46(1) μm below the trapped BEC. Individual panels are labeled by the energy ratio ϵ as defined in the main text. All images have been averaged over 6 independent experimental images with the same parameters. A faint grid is overlaid at 100 μm increments. The scale for square root of the density has been set so that pure white corresponds to the 99.95th percentile over all images to emphasize the caustic structure. The slight fringing seen in the images is due to optical effects in the imaging system, not matter-wave interference.

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