Mixture of bosonic and spin-polarized fermionic atoms in an optical lattice

2006/09/30 by Lode Pollet, Corinna Kollath, Ulrich Schollwöck +2 · 5 citations
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #Quantum many-body systems #cond-mat.other #cond-mat.stat-mech

paper · pdf · doi:10.1103/physreva.77.023608

published as Phys. Rev. A 77, 023608 (2008) · 4 pages, 5 figures

openalex publication_date 2008/02/06 · arxiv created 2008/03/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We investigate the properties of trapped Bose-Fermi mixtures for experimentally relevant parameters in one dimension. The effect of the attractive Bose-Fermi interaction onto the bosons is to deepen the parabolic trapping potential, and to reduce the bosonic repulsion in higher order. This leads for many situations to an increase in bosonic coherence. The opposite effect was observed in ⁸⁷Rb-⁴⁰K experiments, most likely due to a sharp rise in temperature. We also discuss low-temperature features, such as a bosonic Mott insulator transition driven by the fermion concentration, and the formation of composite particles such as polarons and molecules.

Citations

• Instabilities in Binary Mixtures of One-Dimensional Quantum Degenerate Gases
• Bose-Fermi Mixtures in a Three-Dimensional Optical Lattice
• Localization of Bosonic Atoms by Fermionic Impurities in a Three-Dimensional Optical Lattice

Cited by

• Self-Trapping of Bosons and Fermions in Optical Lattices
• Superfluid and Mott-insulator phases of one-dimensional Bose-Fermi mixtures
• Heteronuclear quantum gas mixtures
• Quantum Monte Carlo study of the visibility of one-dimensional Bose-Fermi mixtures
• Do Mixtures of Bosonic and Fermionic Atoms Adiabatically Heat Up in Optical Lattices?