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

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.77.023608· OSTI ID:21140529

Pollet, Lode; Troyer, Matthias ^[1]; Kollath, Corinna ^[2]; Schollwoeck, Ulrich ^[3]

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1. Theoretische Physik, ETH Zuerich, CH-8093 Zuerich (Switzerland)
2. Universite de Geneve, 24 Quai Ernest-Ansermet, CH-1211 Geneve (Switzerland)
3. Institute of Theoretical Physics C, RWTH Aachen University, D-52056 Aachen (Germany)

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 {sup 87}Rb-{sup 40}K 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.

• OSTI ID: 21140529
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 77; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
BOSE-EINSTEIN CONDENSATION
BOSONS
FERMI INTERACTIONS
FERMIONS
MIXTURES
MOLECULES
PARTICLES
POLARONS
POTASSIUM 40
POTENTIALS
RUBIDIUM 87
SPIN ORIENTATION
TEMPERATURE RANGE 0065-0273 K
TRAPPING