The Josephson plasmon as a Bogoliubov quasiparticle

2001/08/31 by G. -S. Paraoanu, G-S Paraoanu, Sigmund Kohler +4 · 5 citations
Chemistry · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #Spectroscopy and Laser Applications #cond-mat

paper · pdf · doi:10.1088/0953-4075/34/23/313

published as J.Phys.B: At.Mol.Opt.Phys. 34 (2001) 4689-4696 · 9 pages, LaTeX, submitted to J. Phys. B

arxiv created 2001/08/31 · openalex publication_date 2001/11/23 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30

Abstract

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.

Citations

• Possible new effects in superconductive tunnelling

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