How trapped particles interact with and sample superfluid vortex excitations
Umberto Giuriato, Giorgio Krstulovic, Sergey Nazarenko
Abstract
In this article, the capability of particles to track the excitations of quantum vortices is investigated theoretically and numerically. The authors observe the emergence of frequency gaps in the vortex wave dispersion relation sampled by the particles. This new excitation spectrum is explained by resorting to an analogy with the propagation of electrons in a solid crystal. The resulting effective model confirms the numerical observation that large scale waves are not perturbed by the particles, and therefore can be tracked
Topics & Concepts
VortexSuperfluidityPhysicsElectronExcitationDispersion (optics)Dispersion relationCondensed matter physicsRotonClassical mechanicsSuperfluid helium-4Quantum mechanicsMechanicsQuantum, superfluid, helium dynamicsCold Atom Physics and Bose-Einstein CondensatesSeismic Waves and Analysis