Work

Sign-alternating interaction mediated by strongly correlated lattice bosons

Year: 2009

Type: article

Abstract: We reveal a generic mechanism of generating sign-alternating intersite interactions mediated by strongly correlated lattice bosons. The ground-state phase diagram of the two-component hard-core Bose–Hubbard model on a square lattice at half-integer filling factor for each component, obtained by worm algorithm Monte Carlo simulations, is strongly modified by these interactions and features the solid+superfluid (SF) phase for strong asymmetry between the hopping amplitudes. The new phase is a direct consequence of the effective nearest-neighbor repulsion between 'heavy' atoms mediated by the 'light' SF component. Due to their sign-alternating character, mediated interactions lead to a rich variety of yet to be discovered quantum phases.

Source: New Journal of Physics

DOI: 10.1088/1367-2630/11/7/073036

Authors: Ş G Söyler, B Capogrosso-Sansone, N V Prokof'ev, B V Svistunov

Institutions: University of Massachusetts Amherst, Harvard University, Center for Astrophysics Harvard & Smithsonian, Kurchatov Institute

Language: English

Topic: Cold Atom Physics and Bose-Einstein Condensates

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,610

Funders: National Science Foundation, Defense Advanced Research Projects Agency, Institute for Theoretical Atomic, Molecular and Optical Physics, Harvard University