Anomalous enhancement of quasiparticle current near a potential barrier in a Bose-Einstein condensate
Anomalous enhancement of quasiparticle current near a potential barrier in a Bose-Einstein condensate
We investigate tunneling properties of Bogoliubov phonons in a Bose-Einstein condensate. We find the anomalous enhancement of the quasiparticle current ${J}_{\mathrm{q}}$ carried by Bogoliubov phonons near a potential barrier, due to the supply of the excess current from the condensate. This effect leads to the increase of quasiparticle transmission probability …