Response functions and superfluid density in a weakly interacting Bose gas with nonquadratic dispersion

2006/05/19 by Jonathan Keeling · 2 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #Strong Light-Matter Interactions #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevb.74.155325

published as Phys. Rev. B 74, 155325 (2006) · 4 pages, 2 figures

arxiv created 2006/05/19 · openalex publication_date 2006/10/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Motivated by the experimental search for Bose condensation of quasiparticles in semiconductors, the response functions of a weakly interacting Bose gas, with isotropic but nonquadratic dispersion, are considered. Nonquadratic dispersion modifies the definition of particle current, and leads to modified sum rules for the current-current response function. The effect of these modifications on the Berezhinski-Kosterlitz-Thouless transition is discussed.

Citations

• On the generalized ward identity
• BCS-BEC crossover in a system of microcavity polaritons
• Ordering, metastability and phase transitions in two-dimensional systems

Cited by

• Collective coherence in planar semiconductor microcavities
• Phase diagram for condensation of microcavity polaritons: From theory to practice