Detection of Majorana surface bound states at the free surface of the superfluid 3He

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I investigated nonlinear transport properties of the positive ions trapped below the free surface of the superfluid 3He-B in order to observe surface bound states. I found that the nonlinear transport properties do not show any depth dependence. I furthermore revealed that mobilities of the positive and negative ions trapped below the free surface do not have any depth dependence. The lack of the depth dependence in the mobilities suggests that the scattering cross sections of the ions are significantly small, which is possibly understood by the Majorana nature of the surface bound states. In addition to these investigations, I discovered the intrinsic Magnus force and detected chirality directly for the first time in the superfluid 3He-A.