Abstract:We consider the propagation of quasiparticle
excitations in a dipolar Bose-Einstein condensate, and derive a nonlocal
field theory of quasiparticle scattering at a stepwise inhomogeneity of
the sound speed, obtained by tuning the contact coupling part of the
interaction on one side of the barrier.
To solve this problem ab initio, i.e., without prior assumptions on the
form of the solutions, we reformulate the dipolar Bogoliubov-de Gennes
equation as a singular integral equation. The latter is of a novel
hypers… Show more
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