The Josephson plasmon as a Bogoliubov quasiparticle

G. S. Paraoanu, S. Kohler, F. Sols, A. J. Leggett

Research output: Contribution to journalArticlepeer-review


We study the Josephson effect in alkali atomic gases within the two-mode approximation and show that there is a correspondence between the Bogoliubov description and the harmonic limit of the phase representation. We demonstrate that the quanta of the Josephson plasmon can be identified with the Bogoliubov excitations of the two-site Bose fluid. We thus establish a mapping between the Bogoliubov approximation for the many-body theory and the linearized pendulum Hamiltonian.

Original languageEnglish (US)
Pages (from-to)4689-4696
Number of pages8
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number23
StatePublished - Dec 14 2001

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics


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