The paper models surface waves of a leaky superfluid 4He film with a forced KP-I equation and gives lump solutions, but the predicted wave-speed reversals and the perturbative solution contain sign and timing errors.
Since, we have considered saturated film (∼ 10−7 cm), the effect of surface tension is not neglected
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Free surface lump wave dynamics of a saturated superfluid Helium film with nontrivial boundary condition at the substrate surface
The paper models surface waves of a leaky superfluid 4He film with a forced KP-I equation and gives lump solutions, but the predicted wave-speed reversals and the perturbative solution contain sign and timing errors.