Enhanced quasi-particle current of Bogoliubov phonons in a Bose-Einstein condensate

Shunji Tsuchiya, Yoji Ohashi

Research output: Contribution to journalArticle

Abstract

We discuss tunneling properties of Bogoliubov excitations through a potential barrier. We find that the quasi-particle current carried by Bogoliubov excitations is remarkably enhanced near the potential barrier at low incident energies. This explains the increase of the transmission probability of Bogoliubov phonons in the low energy region. In addition, taking into account of the backreaction of Bogoliubov excitations on Bose condensates, we show that the quasi-particle current twists the phase of the condensate wavefunction, leading to a Josephson supercurrent through the barrier.

Original languageEnglish
Article number032113
JournalJournal of Physics: Conference Series
Volume150
Issue number3
DOIs
Publication statusPublished - 2009 Jan 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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